| 单词 | endoderm |
| 例句 | After gastrulation, the embryo can be thought of as an onion with three layers: the ectoderm, the mesoderm and the endoderm. Career choice in stem cells: Predetermined or self-selected? 2023-09-19T04:00:00Z In protostomy, solid groups of cells split from the endoderm or inner germ layer to form a central mesodermal layer of cells. Fundamentals of Biology 2015-01-01T00:00:00Z Triploblasts develop a third layer—the mesoderm—between the endoderm and ectoderm. Concepts of Biology 2013-04-25T00:00:00Z These disks eventually formed the three main cell layers of the body: the endoderm, mesoderm and ectoderm. Lab-Grown Monkey Embryos Reveal in 3-D How Organs Begin 2023-05-15T04:00:00Z The three germs layers, shown in Figure 34.23, are the endoderm, the ectoderm, and the mesoderm. Biology for AP Courses 2022-06-09T00:00:00Z Embryonic animal cells differentiate into three germ layers—endoderm, mesoderm, and ectoderm—each developing into different organs and systems. Miller & Levine Biology 2018-01-01T00:00:00Z Sandwiched between the endoderm and the ectoderm is a non-living layer. Fundamentals of Biology 2015-01-01T00:00:00Z A third group of triploblasts has a body cavity that is derived partly from mesoderm and partly from endoderm tissue. Concepts of Biology 2013-04-25T00:00:00Z The folding essentially creates a tube, called the primitive gut, that is lined by the endoderm. Anatomy and Physiology 2013-06-19T00:00:00Z The endoderm gives rise to columnar cells found in the digestive system and many internal organs. Biology for AP Courses 2022-06-09T00:00:00Z Animals with radial symmetry only have the endoderm and ectoderm. Miller & Levine Biology 2018-01-01T00:00:00Z The inner layer is the endoderm, and the outer layer is the ectoderm. Fundamentals of Biology 2015-01-01T00:00:00Z The animal phyla of this and subsequent modules are triploblastic and have an embryonic mesoderm sandwiched between the ectoderm and endoderm. Concepts of Biology 2013-04-25T00:00:00Z Within the first 8 weeks of gestation, a developing embryo establishes the rudimentary structures of all of its organs and tissues from the ectoderm, mesoderm, and endoderm. Anatomy and Physiology 2013-06-19T00:00:00Z The endoderm, mesoderm, and ectoderm are germ layers. Biology for AP Courses 2022-06-09T00:00:00Z For instance, the gut tube and liver derive from the endoderm; muscle and connective tissue from the mesoderm; and neural tissue and skin from the ectoderm. A decade of questions about the fluidity of cell identity 2020-02-23T05:00:00Z The endoderm gives rise to the lining of the digestive tract and the respiratory tract. Fundamentals of Biology 2015-01-01T00:00:00Z The three germ layers are the endoderm, the ectoderm, and the mesoderm. Concepts of Biology 2013-04-25T00:00:00Z Cells lining the airways and most of the digestive system originate in the endoderm. Anatomy and Physiology 2013-06-19T00:00:00Z In gastrulation, the epiblast differentiates into the three germ layers of cells — the ectoderm, mesoderm and endoderm — that will form the fetus. Human embryo implantation modelled in microfluidic channels 2019-09-10T04:00:00Z Using a live-cell imaging microscopy approach and experimental methods supported by mathematical modelling, the authors reveal that there are two distinct regions of the endoderm that differ in their internalization mechanism. Genetics and mechanics combine to guide the embryonic gut 2019-08-13T04:00:00Z The mesoderm is the third germ layer; it forms between the endoderm and ectoderm in triploblasts. Fundamentals of Biology 2015-01-01T00:00:00Z The endoderm gives rise to the gut and many internal organs. Concepts of Biology 2013-04-25T00:00:00Z All cells and tissues in the body derive from three germ layers in the embryo: the ectoderm, mesoderm, and endoderm. Anatomy and Physiology 2013-06-19T00:00:00Z Tolerance induction and reversal of diabetes in mice transplanted with human embryonic stem cell-derived pancreatic endoderm. Pancreas regeneration 2018-05-15T04:00:00Z The part of the endoderm that the authors call the primordium region is the first to internalize. Genetics and mechanics combine to guide the embryonic gut 2019-08-13T04:00:00Z A third group of triploblasts has a slightly different coelom derived partly from mesoderm and partly from endoderm, which is found between the two layers. Fundamentals of Biology 2015-01-01T00:00:00Z Distinct sequential cell behaviours direct primitive endoderm formation in the mouse blastocyst. Blastocyst-like structures generated solely from stem cells 2018-05-01T04:00:00Z The endoderm, or inner tissue, is responsible for generating the lining tissues of various spaces within the body, such as the mucosae of the digestive and respiratory systems. Anatomy and Physiology 2013-06-19T00:00:00Z They found that most of the gill tissue developed from the endoderm — as it does in jawless vertebrates. Evolution: Origin of vertebrate gills : Nature : Nature Research 2017-02-21T05:00:00Z In the other part of the endoderm, which the authors term the propagation region, internalization occurred progressively, one row of cells at a time. Genetics and mechanics combine to guide the embryonic gut 2019-08-13T04:00:00Z Outside this digestive cavity are three tissue layers: an inner endoderm, a central mesoderm, and an outer ectoderm. Fundamentals of Biology 2015-01-01T00:00:00Z We used a similar approach to computationally identify factors that are differentially expressed in mesoderm and endoderm. Transcription factor binding dynamics during human ES cell differentiation : Nature : Nature Publishing Group 2015-02-17T05:00:00Z The endoderm gives rise to the thyroid and parathyroid glands, as well as the pancreas and the thymus. Anatomy and Physiology 2013-06-19T00:00:00Z For this purpose we identified small molecules that aided endoderm and hepatocyte differentiation without compromising proliferation. Mouse liver repopulation with hepatocytes generated from human fibroblasts 2014-04-04T18:27:44.990Z Maybe it is because, if the entire endoderm contracted simultaneously, embryo geometry would be impaired. Genetics and mechanics combine to guide the embryonic gut 2019-08-13T04:00:00Z Here, the mesoderm develops as pouches that are pinched off from the endoderm tissue. Fundamentals of Biology 2015-01-01T00:00:00Z Specific loss of DNA methylation in dEN coincides with specific binding of several endoderm factors. Transcription factor binding dynamics during human ES cell differentiation : Nature : Nature Publishing Group 2015-02-17T05:00:00Z In contrast, endocrine glands that arise from the endoderm and ectoderm produce the amine, peptide, and protein hormones. Anatomy and Physiology 2013-06-19T00:00:00Z Next we investigated whether de novo endoderm differentiation was preceded by a pluripotent state. Mouse liver repopulation with hepatocytes generated from human fibroblasts 2014-04-04T18:27:44.990Z It has usually been regarded as representing both endoderm and mesoderm, and the groove which usually leads to its formation has been compared to the abnormally elongated blastopore of a typical gastrula. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z During embryonic development, all the body's organs and tissues develop from one of the three germ layers: endoderm, mesoderm and ectoderm. Stem Cells: Flexible friends 2012-02-29T18:21:27.080Z We maintained the cells for three days in feeder-free culture and then induced directed differentiation towards mesendoderm, endoderm, mesoderm, and ectoderm using different media conditions. Transcription factor binding dynamics during human ES cell differentiation : Nature : Nature Publishing Group 2015-02-17T05:00:00Z The endocrine system originates from all three germ layers of the embryo, including the endoderm, ectoderm, and mesoderm. Anatomy and Physiology 2013-06-19T00:00:00Z The micromeres give rise to the ectoderm; each of the sixteen macromeres, after budding off a small mesoblast cell, passes on as endoderm. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z This invaginated layer of cells, brought into a new position with regard to its environment, becomes the endoderm and receives the stimulus to assume the character appropriate to the new environment. The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development 2011-08-29T02:01:04.170Z These layers are severally called ectoderm and endoderm. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z Specific loss of DNA methylation in dEN coincides with specific binding of several endoderm factors. Transcription factor binding dynamics during human ES cell differentiation : Nature : Nature Publishing Group 2015-02-17T05:00:00Z It is a complex process that includes many structures, most of which arise from the endoderm. Anatomy and Physiology 2013-06-19T00:00:00Z The endoderm consists mainly of comparatively large cells with polygonal bases which can be seen from the external surface of the column in colourless individuals. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Huxley, who compared the serous and mucous layers of Pander with the ectoderm and endoderm of the Coelenterata. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Identify the endoderm and ectoderm cells, the spicules or fibers, and, among the spicules or fibers, irregular amœboid cells, sometimes called mesoderm cells. A Guide for the Study of Animals 2011-01-18T03:00:14.913Z The reproductive 98 organs or gonads are borne on the mesenteries, the germinal cells being derived from the inner layer or endoderm. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The first layer is the endoderm, a sheet of cells that displaces the hypoblast and lies adjacent to the yolk sac. Anatomy and Physiology 2013-06-19T00:00:00Z Nettle-cells are occasionally found in the endoderm, but apparently do not originate in this layer. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z As has been implied in the above account, mesenchyme is usually formed from epithelial mesoderm or from endoderm, or from tissue destined to form endoderm. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The mesoderm also originates at the anal side of the ectoderm and extends in two bands right and left between ectoderm and endoderm. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" The inner layer or endoderm is also a cellular layer, and is chiefly made up of columnar cells, each bearing a cilium at its free extremity and terminating internally in a long muscular fibre. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Whereas the ectoderm and endoderm form tightly connected epithelial sheets, the mesodermal cells are less organized and exist as a loosely connected cell community. Anatomy and Physiology 2013-06-19T00:00:00Z In the Calcutta phase of H. vulgaris colour is due entirely to amorphous particles situated mainly in the cells of the endoderm. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It is generally, though not always, developed from the endoderm, either as hollow outgrowths containing prolongations of the enteric cavity, which become the coelom, or as solid proliferations. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Later on the same anal edge of the ectoderm forms another cellular layer, the endoderm proper, which forms a continuous sheet below the ectoderm. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" In Actinians the epithelio-muscular cells of the endoderm are crowded with yellow spherical bodies, which are unicellular plants or Algae, living symbiotically in the tissues of the zooid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The endoderm is generally also an epithelium one cell in thickness, the cells being digestive, secretory and sometimes muscular. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" A large share of the substances thus prepared falls down to the bottom of the cavity and are there digested by the endoderm cells. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z This cup-stage is called the gastrula stage; the outer wall of the gastrula is the ectoderm, and its inner the endoderm; while its cavity is the enteron, and the opening to the exterior the blastopore. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z From the mucous layer, or endoderm, is developed the apparatus of nutrition; while from the serous layer, or ectoderm, is developed the apparatus of external action. Essays: Scientific, Political, & Speculative, Vol. I The endoderm contains in addition gland cells and nervous elements. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The Coelentera may thus be briefly defined as Metazoa which exhibit two embryonic cell-layers only,—the ectoderm and endoderm,—their body-cavities being referable to a single cavity or coelenteron in the endoderm. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The colouring matter in its body becomes broken up into irregular patches owing to degeneracy of the endoderm cells, and it dies within a few hours. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z As a general rule the ectoderm and endoderm, which may be called the primary layers, come first, and later the mesoderm is developed from one or other of them. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Leaves in fascicles of 3, the sheath persistent, from 20 to 30 cm. long; resin-ducts external, the hypoderm often in large masses, some or all of the endoderm cells with thick outer walls. The Genus Pinus In the course of development, however, cells from the ectoderm and endoderm may migrate into it. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The sexual cells of the medusoid lie in the endoderm on interradii, that is, on the second set of radii accentuated in the course of development. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The point to remember is, that in all cases a gastrula is an open sac composed of two layers of cells—the outer layer being called the ectoderm, and the inner the endoderm. Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions In it cleavage gives rise to a solid mass, which divides by delamination into two layers, the ectoderm and endoderm. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Leaves in fascicles of 3, the sheath persistent, from 20 to 30 cm. long; the hypoderm often in large masses, the resin-ducts external, the endoderm with thin outer walls. The Genus Pinus It has been shown that these asulcar filaments are derived from the ectoderm, the remainder from the endoderm. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" In the Coelentera the ectoderm and endoderm are set apart from one another at a very early period in the life-history; generally either by delamination or invagination, processes described in the article Embryology. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" It is enough for us that they always end in the formation of the two primary layers of ectoderm and endoderm. Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions The endoderm, on the other hand, gives rise to the lining of the enteron, and of the glands which open into it. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Leaves binate, sometimes ternate, from 15 to 30 cm. long, rigid, erect; hypoderm of uniform thick-walled cells; resin-ducts of remarkable size, septal, or not quite touching the endoderm and technically external. The Genus Pinus As the mesenteries are formed, the endoderm of the basal disk lying above the basal plate is raised up in the form of radiating folds. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Endomesoderm: the inner layer formed by an invagination of the middle portion of the primitive band of the embryo, and from which the endoderm and mesoderm are subsequently differentiated. Explanation of Terms Used in Entomology This stage of differentiation consists in the formation of either a pouch or an additional layer between the ectoderm and the endoderm, which is called the mesoderm. Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions According to Haeckel, the origin of the generative products in the mesoderm is a heterotopic phenomenon, for he considers that they must have originated phylogenetically in one of the two primary layers, ectoderm or endoderm. Form and Function A Contribution to the History of Animal Morphology Leaves in fascicles of 5, sometimes of 6, from 15 to 30 cm. long, drooping; resin-ducts medial, hypoderm variable in amount, often in very large masses, the outer walls of the endoderm thick. The Genus Pinus The ectoderm beneath each fold becomes detached from the surface of the basal plate, and both it and the mesogloea are folded conformably with the endoderm. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Entoderm: the innermost germ layer of the embryo, from which are derived the epithelium of the alimentary canal and accessory structures: = endoderm and hypoblast. Explanation of Terms Used in Entomology To begin with the differentiation into ectoderm and endoderm, the organism is comparable to a human community made up of military and agricultural classes. The Doctrine of Evolution Its Basis and Its Scope It will be remembered that Remak introduced in 1855 the conception of the mesoderm as an independent layer derived from the endoderm. Form and Function A Contribution to the History of Animal Morphology Leaves prevalently in fascicles of 3, but varying from 2 to 5 or more, from 12 to 36 cm. long; resin-ducts medial, hypoderm uniform or multiform, outer walls of the endoderm thick. The Genus Pinus These form a more or less complicated canal system, lined by endoderm, and communicating with the cavities of the zooids. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The leaves differ from all that I have examined in showing thick-walled endoderm cells, but the cone corresponds with many of my own collection. The Genus Pinus Leaves in fascicles of 2 to 5, from 15 to 22 cm. long; resin-ducts internal, hypoderm biform, endoderm with thin outer walls. The Genus Pinus Leaves in fascicles of 3, from 20 to 45 cm. long, rigid; resin-ducts internal, hypoderm biform, endoderm with thin outer walls. The Genus Pinus Leaves prevalently in fascicles of 3, but varying from 3 to 5, from 10 to 20 cm. long; resin-ducts medial, sometimes with an internal duct, hypoderm biform, endoderm with thick outer walls. The Genus Pinus Corals have been divided into Aporosa and Perforata, according as the theca and septa are compact and solid, or are perforated by pores containing canals lined by endoderm. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Leaves in fascicles of 2 and 3, or more in its southern range, from 12 to 25 cm. long; resin-ducts internal, hypoderm biform, endoderm with thin outer walls. The Genus Pinus Leaves in fascicles of 3, from 12 to 25 cm. long; resin-ducts medial, sometimes with an internal duct, hypoderm biform, endoderm with thin outer walls. The Genus Pinus Leaves in fascicles of 2, from 9 to 12 cm. long; resin-ducts medial, hypoderm weak, sometimes of a single row, biform when of two rows, endoderm with thin outer walls. The Genus Pinus Leaves in fascicles of 3, 4 or 5, not exceeding 24 cm. in length; resin-ducts internal, often with one or two medial ducts, hypoderm biform, endoderm usually with thin outer walls. The Genus Pinus Leaves in fascicles of 2 and 3, from 7 to 12 cm. long; resin-ducts medial, with an occasional internal duct, hypoderm weak, biform when of two rows of cells, endoderm with thin outer walls. The Genus Pinus Leaves ternate, from 15 to 25 cm. long; resin-ducts internal or with an occasional septal duct, hypoderm biform, in thick masses, often projecting far into the green tissue and sometimes touching the endoderm. The Genus Pinus |
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