| 单词 | oviduct |
| 例句 | In Michigan, eggs taken from the oviducts of robins dead of DDT poisoning showed concentrations up to 200 parts per million. Silent Spring 1962-09-27T00:00:00Z Most species are ovoviviparous: The fertilized egg is retained in the oviduct of the mother’s body and the embryo is nourished by the egg yolk. Fundamentals of Biology 2015-01-01T00:00:00Z The lateral ends of the oviducts flare out into a trumpet-like structure and have a fringe of finger- like projections called fimbrae. Concepts of Biology 2013-04-25T00:00:00Z When that process is working correctly, one yolk at a time is released into her oviduct. Perspective | An eggs-cellent question: Whatever happened to double-yolk eggs? 2022-12-17T05:00:00Z The lateral ends of the oviducts flare out into a trumpet-like structure and have a fringe of finger- like projections called fimbriae, illustrated in Figure 34.12b. Biology for AP Courses 2022-06-09T00:00:00Z Eggshells form quickly—within 24 hours inside the bird’s oviduct—and promptly trap proteins inside the calcium and mineral crystals that form the shell. Egg-eating humans helped drive Australia’s ‘thunder bird’ to extinction 2022-05-25T04:00:00Z Even when they are no longer obvious, algal DNA remains detectable in adult salamanders in the oviducts and the male reproductive tract. Algae Living inside Salamanders Aren't Happy about the Situation 2018-05-20T04:00:00Z The walls of the oviducts have a ciliated epithelium over smooth muscle. Concepts of Biology 2013-04-25T00:00:00Z When a bird begins creating an egg, the animal pumps the egg through an oviduct, a passageway of glands like a factory line. Ever wonder why eggs are shaped like eggs? Scientists say they’ve figured it out. 2017-06-22T04:00:00Z The walls of the oviducts are ciliated and are made up mostly of smooth muscle. Biology for AP Courses 2022-06-09T00:00:00Z Chart by G. Grullón / Science Every bird creates its eggs in a stretchy tube called the oviduct. Cracking the egg mystery: what makes eggs round or pointy? 2017-06-22T04:00:00Z Ultimately, only two pups remain, one in each oviduct. In Many Species, a Family Dinner Means Something Else 2017-01-30T05:00:00Z Fertilization usually takes place within the oviduct and the developing embryo is moved toward the uterus. Concepts of Biology 2013-04-25T00:00:00Z He writes clearly, with accuracy and wit, about the ovum's development in the bird's ovary and its journey through the oviduct. Ornithology: Oology unshelled : Nature : Nature Publishing Group 2016-04-12T04:00:00Z Fertilization usually takes place within the oviducts and the developing embryo is moved toward the uterus for development. Biology for AP Courses 2022-06-09T00:00:00Z She also frequently implants deslorelin in backyard chickens to prevent oviduct impaction — a life-threatening condition that occurs when eggs get backed up in the reproductive system and which costs about $1,000 to surgically repair. How high-tech treatments add hope, and cost, to keeping a sick pet alive 2015-06-20T04:00:00Z Dr. Kuchling examined the sedated female’s cloaca with a fiber-optic endoscope to locate the compartment leading to her oviducts. Scientists Make Novel Attempt to Save Giant Turtle Species 2015-05-25T04:00:00Z Sterilization in women is called a tubal ligation; it is analogous to a vasectomy in males in that the oviducts are severed and sealed, preventing sperm from reaching the egg. Concepts of Biology 2013-04-25T00:00:00Z Of the hundreds of millions of sperm cells that begin the journey up the oviducts, only a few ever reach their destination. Sperm swim upstream 'in a shoal' 2014-05-27T04:00:00Z It usually takes the egg or embryo a week to travel through the oviduct. Biology for AP Courses 2022-06-09T00:00:00Z Chelonian species are known for their long-term sperm storage, and females are capable of storing viable sperm for three or four years in specialised tubes within their oviduct. Paternity testing for tortoises 2012-11-16T04:00:27Z You glided along the oviduct, surviving happily on the stored nutrients and genetic messages that Mom packed for you. Biologist Asserts Your Life Began...Before Fertilization. 2012-08-29T13:52:11Z Cell division is again arrested, this time at metaphase II. At ovulation, this secondary oocyte is released and travels toward the uterus through the oviduct. Concepts of Biology 2013-04-25T00:00:00Z Once the female’s oviduct is filled with sperm, she is able to lay eggs that were internally fertilised. Get on your bike, Phallostethus cuulong 2012-07-25T17:45:06.547Z Sterilization in women is called a tubal ligation; it is analogous to a vasectomy in males in that the oviducts are severed and sealed. Biology for AP Courses 2022-06-09T00:00:00Z Sperm need time to get into position in the oviduct, the tube connecting the ovary and uterus, where they can stay for up to five days before dying off, Dr. Blithe said. Medication’s Nickname May Have Helped in Its Politicization 2012-06-05T17:27:42Z If all goes to plan, explains Hildebrandt, he will insert the endoscope into Puntung's uterus and attempt to lance some of the cysts, particularly ones that are preventing sperm from entering the oviducts. Endangered species: Sex and the single rhinoceros 2012-05-30T17:50:32.700Z Most species are ovoviviparous, that is, the fertilized egg is retained in the oviduct of the mother’s body, and the embryo is nourished by the egg yolk. Concepts of Biology 2013-04-25T00:00:00Z In women the corresponding operation—a section of the oviduct—is termed salpingectomy. Being Well-Born An Introduction to Eugenics 2012-05-22T15:16:53.140Z At ovulation, this secondary oocyte will be released and travel toward the uterus through the oviduct. Biology for AP Courses 2022-06-09T00:00:00Z Once the egg is released, it “signals to the sperm to detach from the wall of the oviduct and swim toward the egg,” she said. Medication’s Nickname May Have Helped in Its Politicization 2012-06-05T17:27:42Z The paired oviducts and vasa deferentia are, as we have seen, mesodermal in origin. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z The zygote initiates cleavage and the developing embryo travels through the oviduct to the uterus. Concepts of Biology 2013-04-25T00:00:00Z During the progress of these several formations, the egg gradually advances about half way along the oviduct. Sheep, Swine, and Poultry Embracing the History and Varieties of Each; The Best Modes of Breeding; Their Feeding and Management; Together with etc. 2012-03-21T02:00:35.167Z An egg is fertilized by the sperm internally in the oviduct. Biology for AP Courses 2022-06-09T00:00:00Z “When you have good mucus, the sperm get up into the oviduct, they bind and they’re in this solution that keeps them happy for up to five days,” Dr. Blithe said. Medication’s Nickname May Have Helped in Its Politicization 2012-06-05T17:27:42Z Each ovary was always kept associated with the oviduct of the same side, but in some instances it was not recorded whether the organs were left or right. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z In some forms this receptacle acquires a separate external opening remaining connected with the oviduct internally. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z When the shell is fully formed, the egg continues to advance along the oviduct, till the hen goes to her nest and lays it. Sheep, Swine, and Poultry Embracing the History and Varieties of Each; The Best Modes of Breeding; Their Feeding and Management; Together with etc. 2012-03-21T02:00:35.167Z If it is not fertilized, it will return to the oviduct. Biology for AP Courses 2022-06-09T00:00:00Z One female Sharp-tailed Sparrow, weighing 23.1 gm., was not included in the averages because it had an egg with shell in the oviduct. Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima 2011-06-01T02:00:28.030Z Eggs laid in the laboratory had higher rates of infertility and prenatal mortality than did eggs dissected from oviducts. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z In young birds both oviducts are almost equal in size, but the right soon degenerates into an insignificant strand. Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" 2010-12-20T17:12:05.780Z From ill health, or accidents, eggs are sometimes excluded from the oviducts before the shell has begun to be formed, and in this state they are popularly called wind-eggs. Sheep, Swine, and Poultry Embracing the History and Varieties of Each; The Best Modes of Breeding; Their Feeding and Management; Together with etc. 2012-03-21T02:00:35.167Z If it is not fertilized, it will return to oviduct. Biology for AP Courses 2022-06-09T00:00:00Z We have here clearly a case of a true coelomoduct performing the function of an oviduct in both leeches and Eudrilidae. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Approximately half of the females captured in May, 1956, had sperm in their oviducts, but females captured in June and July did not. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z There is a large median ovary followed by a short oviduct forming a circum-intestinal collar and a common atrium. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Viviparity occurs both among the limbless and the tailed Amphibia, the eggs hatching before they leave the oviduct or immediately after extrusion. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" The lowest of the mammalia—the Monotremata—in common with birds, have oviducts which towards their lower extremities are dilated into cavities severally performing in an imperfect way the function of a uterus. Essays: Scientific, Political, & Speculative, Vol. I It is possible, however, that those oviducts belong to a separate morphological category, more comparable to the dorsal pores and to abdominal pores in some fishes. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" The eggs acquire shells soon after they enter the oviducts. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z She continuously elaborates eggs; every moment one appears at the orifice of the oviduct. The Industries of Animals These leave the body in the form of two long strings—one from each oviduct—of translucent globules, gelatinous in texture, and enclosing a central sphere of yolk, the upper pole of which is black. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" From the fleece of the male the larva moves, three or four weeks later, to that of the female, at the moment of coupling; and then from the female to the egg leaving the oviduct. The Glow-Worm and Other Beetles The ovary is double, and the oviducts open by a median ventral pore about the middle of the body; in this region there is a second swelling both in Chaetosoma and in Rhabdogaster. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Darkening of oviducts seemed to coincide with the period when eggs were in the oviducts and it persisted for a variable length of time after the eggs were laid. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z The female fish bears underneath her tail a prolongation of the oviduct; she introduces it delicately between the Mollusc’s valves and allows an egg to fall between his branchial folds. The Industries of Animals Normally the young leaves the egg immediately after its extrusion, but if by any chance this extrusion is delayed they escape while yet in the oviduct. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" I feel sure that it does not bristle in this fashion when it descends the delicate natal sheath; it is near the end of the oviduct that it receives its coat of scales. The Glow-Worm and Other Beetles The sperm ducts are usually longer than the oviducts; but in Limicolae both series of tubes opening by the funnel into one segment and on to the exterior in the following segment. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Sperm flushed from the oviducts were in clumps of several hundred and showed no sign of motility a few minutes after the female was anesthetized with chloroform. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z He observes that he has never been able to find the termination of the oviducts in the abdomen, nor any other parts excepting those which he has described. New observations on the natural history of bees Generally three or five of these ova develop at the same time, some in one oviduct, some in the other. The Renewal of Life; How and When to Tell the Story to the Young I hesitate until I surprise the mother using her hind-legs to finish extracting the strange germ which issues slowly and perhaps laboriously from her oviduct. The Glow-Worm and Other Beetles This cavity and its walls becomes prolonged to form the oviducts. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Information gleaned from records of gravid females and known dates of nesting suggests that eggs are retained in the oviducts two to three weeks before laying. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z However, I have clearly observed a muscular swelling of the oviduct, where approaching the last ring of the belly; that it then contracts and afterwards dilates in becoming membranaceous. New observations on the natural history of bees There is no separate opening for the oviduct into the outer world. The Renewal of Life; How and When to Tell the Story to the Young I have seen the egg leave the oviduct; it is then what it will be later, but lighter in colour. The Glow-Worm and Other Beetles To this category will belong the oviducts in Teleostean fishes and probably the gonad ducts in several groups of invertebrates. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Fig. 8: sperm in uterine portion of oviduct of female obtained on April 18, 1954. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z We have remarked that the oviduct did not issue from the body, but that the eggs fall into a kind of cavity, where they are retained several seconds before being laid. New observations on the natural history of bees As the bird approaches maturity, one ovary and its oviduct enlarge, and the ova, which develop from the inside of the ovary just as the ovule develops inside the flower ovary, also become large. The Renewal of Life; How and When to Tell the Story to the Young In descending the oviduct to be deposited in the cells, they pass by the mouth of this seminal sac or spermatheca, and receive a portion of its fertilizing contents. Langstroth on the Hive and the Honey-Bee A Bee Keeper's Manual In some cases, e.g. oviducts of Oligochaeta, sperm ducts of Phreoryctes, the coelomoducts occupy, like the nephridia, two segments, the funnel opening into that in front of the segment which carries the external pore. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" A few sperm are stored in the oviducts; fertilization without reinsemination can occur. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z As the queen now made new efforts, we saw an egg fall into the cavity from the end of the oviduct. New observations on the natural history of bees After the egg is fertilized it continues its slow journey down the oviduct, which enlarges to accommodate it. The Renewal of Life; How and When to Tell the Story to the Young The two stigmata or breathing pores open near the cleft in the end of the body, and the external opening of the oviduct is situated between the largest and third pair of legs. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses Colleterium: a glandular structure accessory to the oviduct, secreting the viscid material used in cementing the eggs together. Explanation of Terms Used in Entomology Eggs that had remained in the oviducts longer had a calceous layer on the outside of the shell. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z As I was desirous of preserving the poison bag, which is situated exactly here, along with, the muscles aiding the motion of the sting, I could follow the oviduct no farther. New observations on the natural history of bees It is their destiny to remain in the oviduct and develop. The Renewal of Life; How and When to Tell the Story to the Young The Chigoe lays about sixty eggs, depositing them in a sort of sac on each side of the external opening of the oviduct. Our Common Insects A Popular Account of the Insects of Our Fields, Forests, Gardens and Houses He described the oviduct of the sheep and rightly held that life was possible without the spleen. The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield Shells of the eggs are translucent and pinkish or yellowish when the eggs are in the oviducts. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z In these last, the oviducts to all appearance were but imperfectly developed, and more address than we had acquired in dissection was necessary to distinguish them. New observations on the natural history of bees Unlike the oviduct of the bird, which opens into the intestine, these ducts unite just before the end, and have separate openings of their own. The Renewal of Life; How and When to Tell the Story to the Young The function of the Fallopian tubes or oviducts as they are sometimes called is to catch the ovum as it bursts through the ovary and to conduct it from the ovary into the uterus. Woman Her Sex and Love Life The oviduct removed on the animal's left, and the ovary on its right. Text Book of Biology, Part 1: Vertebrata After several days outside the oviducts the shells become chalky-white and nearly opaque. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z As, in the natural state, she lays the eggs of workers only, during the first eleven months, it is clear that these, and the male eggs, are not indiscriminately mixed in the oviducts. New observations on the natural history of bees Commencing with its extreme right-hand end, the ligament is inserted into the line of reflection of the mantle, and then into the wall of the oviduct, which becomes enclosed as it were within the ligament. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology This is the oviduct, and its dimensions are the same as those of the rostrum. Social Life in the Insect World The Female, the oviduct of the left side cut away, -and an egg case in the oviduct.- Text Book of Biology, Part 1: Vertebrata Extrauterine migration of ova results usually in a more even distribution of eggs in the oviducts. Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz 2011-10-01T02:00:30.200Z My assistant extracted one from the oviducts, and succeeded in fixing it by an end on a glass slider. New observations on the natural history of bees The pallio-visceral ligament seen from below: torn on the right side to show the rectum and oviduct; cut through on the left side along the dotted line close to d' in the preceding figure. a. Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology However far withdrawn into the centre of the pea, the Bruchus, whether larvæ or nymph, is reached by the long oviduct. Social Life in the Insect World It is also called the Mullerian duct, and in the great majority of vertebrata it becomes the oviduct, uniting with its fellow, in the case of the dog-fish, ventral to the oesophagus. Text Book of Biology, Part 1: Vertebrata This canal is continued on both sides into the Fallopian tubes or oviducts. Disease and Its Causes Farther, it appears that the queen can lay no male eggs until those of workers, occupying the first place in the oviducts, are discharged. New observations on the natural history of bees Occasionally when there was only the normal single oviduct pore present it varied in position, once occurring on the 10th, and once on the 11th segment. Darwinism (1889) This is only an insignificant trace of some albuminous secretion accompanying the egg or facilitating the work of the double saw of the oviduct. Social Life in the Insect World The two oviducts meet in front of the liver ventral to the oesophagus, and have there a common opening by which the ova are received after being shed into the body cavity. Text Book of Biology, Part 1: Vertebrata However far withdrawn into the centre of the pea, the Bruchus, whether larvae or nymph, is reached by the long oviduct. A Book of Exposition They remain thus about an hour or more, and during this time the male shifts the arm from one oviduct to the other. Studies in the Psychology of Sex, Volume 3 Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women "Liver spots" or "meat spots" are detached folds from the walls of the oviduct. The Dollar Hen I surprised the female motionless, with the oviduct planted vertically in the soil. Social Life in the Insect World The coelom of the dog-fish is peculiar-- among the types we treat of-- in the possession of two direct communications with the exterior, in addition to the customary indirect way through the oviduct. Text Book of Biology, Part 1: Vertebrata The figure on the left of the plate represents a curious cluster of papillae which project from one side of the mouth, and are the opening of the oviduct. Glaucus, or the Wonders of the Shore They serve as renal organs, and often, also, as oviducts and sperm ducts. The Gutenberg Webster's Unabridged Dictionary Section S B, The proboscis of one still more highly magnified. means of an oviduct. The Project Gutenberg Encyclopedia Volume 1 of 28 The aperture is not closed, except by the bunch of woody fibres, which, parted at the moment when the eggs are laid, recover themselves when the double saw of the oviduct is removed. Social Life in the Insect World The distal end of the oviduct is, therefore, not unfrequently styled the uterus. Text Book of Biology, Part 1: Vertebrata In these cases there is no placenta and generally no adhesion of ovum or embryo to walls of oviduct or ovary. Hormones and Heredity The blood present in the digestive tract of the worm gives it a brown color, and the white oviducts which are wound around the digestive canal cause the body to appear twisted. Common Diseases of Farm Animals We left it, a hollow ball passing down the oviduct; had we examined the sphere more closely we should have found its wall composed of a single layer of cells. The Prospective Mother, a Handbook for Women During Pregnancy The oviducts proper are developed only from their upper part; the lower part dilates into a spindle-shaped tube with thick muscular wall, in which the impregnated ovum develops into the embryo. The Evolution of Man — Volume 2 In the female find the opening of the oviducts in front of the liver. Text Book of Biology, Part 1: Vertebrata There was a fully developed oviduct on the left side, on the right another less than half the full length. Hormones and Heredity The mature ova of the mammal, when they have left the ovary, are fertilised either here or in the oviduct immediately afterwards by the invading sperm-cells.* The Evolution of Man — Volume 1 As the ovum escapes from the oviduct and enters the womb, it is smaller, in all probability, than the head of a pin. The Prospective Mother, a Handbook for Women During Pregnancy Finally, in the apes and in man the blending of the two halves is complete, and there is only the one simple, pear-shaped uterine pouch, into which the oviducts open on each side. The Evolution of Man — Volume 2 As long as she does not feel ripe eggs coming to her oviduct, the greenbottle remains in the sun, hovering to and fro and sipping modest mouthfuls from the carcass. The Life of the fly; with which are interspersed some chapters of autobiography Internally there were two oviducts, that of the left side normally developed, that of the right diminutive and less than half the full length. Hormones and Heredity We have never yet had occasion to dissect a woman immediately after impregnation and examine the stem-cell or the segmentation-cells in her oviduct. The Evolution of Man — Volume 1 When the ovum has ripened, it becomes detached from the ovary, and enters a fleshy tube about the size of a lead pencil, known as the oviduct. The Prospective Mother, a Handbook for Women During Pregnancy The Queen-bee would thus lay female eggs or male eggs according as she fertilized them or not while they were passing into her oviduct. Bramble-Bees and Others The active agent of transportation is the oviduct, which has been fitted for this purpose with millions of short, hair- like structures that project into its interior. The Prospective Mother, a Handbook for Women During Pregnancy If this theory is sound, it would follow that corpora lutea are not formed in cases where the ova are not retained in the oviduct during their development. Hormones and Heredity The clear, glarous mass of albumin that surrounds the yellow yelk of the bird's egg, and also the hard chalky shell, are only formed within the oviduct round the impregnated ovum. The Evolution of Man — Volume 1 The journey is fraught with momentous consequences, for it is during this passage through the oviduct that the fate of the ovum is determined. The Prospective Mother, a Handbook for Women During Pregnancy While passing through the oviduct, the ovum has no attachment whatever to the mother, yet development is going on all the time. The Prospective Mother, a Handbook for Women During Pregnancy Either here in the oviduct or after the mammal gastrula has passed into the uterus it is converted into the globular vesicle which is shown externally in Figure 1.106, and in section in Figure 1.107. The Evolution of Man — Volume 1 The cleavage and formation of the gastrula take place in the oviduct. The Evolution of Man — Volume 1 But afterwards, while still within the oviduct, it takes up a quantity of nourishment and works this into the familiar large yellow yelk. The Evolution of Man — Volume 1 And it is practically certain that these cells meet in the oviduct, even in that portion of it which receives the ovum just as it leaves the ovary. The Prospective Mother, a Handbook for Women During Pregnancy When the mature bird-ovum has left the ovary and been fertilised in the oviduct, it covers itself with various membranes which are secreted from the wall of the oviduct. The Evolution of Man — Volume 1 |
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