| 单词 | parenchyma |
| 例句 | The tissue consists of conducting cells, known as tracheids, and supportive filler tissue, called parenchyma. Fundamentals of Biology 2015-01-01T00:00:00Z Xylem tissue has three types of cells: xylem parenchyma, tracheids, and vessel elements. Biology for AP Courses 2022-06-09T00:00:00Z Similarly, injection of tracers into the brain parenchyma showed reduced ISF drainage into deep cervical lymph nodes. A lymphatic waste-disposal system implicated in Alzheimer’s disease 2018-07-24T04:00:00Z Enhancing amyloid-β clearance from the parenchyma is an alternative approach to modifying amyloid-β levels, and this is being pursued mainly through active and passive strategies of immunization against the peptide. The road to restoring neural circuits for the treatment of Alzheimer's disease : Nature : Nature Research 2016-11-08T05:00:00Z Magnetic resonance imaging and brain biopsy were consistent with fulminant demyelinating encephalomyelitis with enhancing parenchyma and leptomeninges. Researchers Highlight Warning Signs On Adult Stem Cell Treatments 2013-02-12T19:17:24Z The cortex, pith, and epidermis are made of parenchyma cells. Fundamentals of Biology 2015-01-01T00:00:00Z Phloem tissue is composed of sieve-tube cells, companion cells, phloem parenchyma, and phloem fibers. Biology for AP Courses 2022-06-09T00:00:00Z Notably, the researchers found that the mouse models did not develop any apparent structural or functional changes in the meningeal lymphatics at the time when amyloid-β deposition in the brain parenchyma first became apparent. A lymphatic waste-disposal system implicated in Alzheimer’s disease 2018-07-24T04:00:00Z RNA interference provides a direct way to study putative cancer targets; however, specific delivery of therapeutics to the tumor parenchyma remains an intractable problem. [Research Articles] Targeted Tumor-Penetrating siRNA Nanocomplexes for Credentialing the Ovarian Cancer Oncogene ID4 2012-08-15T19:25:12.477Z Hemorrhages occur from the larynx, bronchial membrane, intestinal surfaces, and even into the parenchyma of the viscera, the muscles, serous membranes, periosteum, and neurilemma. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The upper part of the mesophyll is comprised of columnar cells called palisade parenchyma. Fundamentals of Biology 2015-01-01T00:00:00Z In aquatic plants, the intercellular spaces in the spongy parenchyma help the leaf float. Biology for AP Courses 2022-06-09T00:00:00Z The cortex proper, consisting of parenchyma cells, pa, some of which contain crystals. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z The protoxylem-elements are situated at the extreme inner edge of the secondary wood, and may occur as small groups of narrow, spirally-pitted elements scattered among the parenchyma which abuts on the main mass of wood. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The exudations may be superficial or deep-seated; they may lie within the cells, parenchyma, of an organ, or within the interstitial tissue of the same. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The lower part of the mesophyll is made up of loosely packed spongy parenchyma. Fundamentals of Biology 2015-01-01T00:00:00Z Chloroplasts are also present in the spongy parenchyma, but are not as obvious. Biology for AP Courses 2022-06-09T00:00:00Z A week or more later these hatch into little caterpillars that feed together in colonies upon the green tissues of the leaf, taking only the succulent parenchyma and leaving the network of veins. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z The secondary wood of Ephedra consists of tracheids, vessels and parenchyma; the vessels are characterized by their wide lumen and by the large simple or slightly-bordered pits on their oblique end-walls. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The commonest of the latter are inflammations of the parenchyma of the lungs. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The parenchyma cells that make up the cortex are the largest in the root. Fundamentals of Biology 2015-01-01T00:00:00Z Below the palisade parenchyma are loosely arranged cells of an irregular shape. Biology for AP Courses 2022-06-09T00:00:00Z It is not necessary to deal here with most of the cells that occur in the parenchyma or gelatinous part of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Abies, Tsuga, Larix, &c., the mesophyll is heterogeneous, consisting of palisade and spongy parenchyma. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Besides the tracheae and tracheids already noted are such cells as "wood fiber," "fibrous cells," and "parenchyma." Wood and Forest 2011-03-01T03:00:42.647Z They extend into and ramify in the leaves, spreading out in a horizontal plane, as the framework of ribs and veins, which supports the softer cellular portion or parenchyma. The Elements of Botany For Beginners and For Schools The air space found between the spongy parenchyma cells allows gaseous exchange between the leaf and the outside atmosphere through the stomata. Biology for AP Courses 2022-06-09T00:00:00Z This is because the cells of their parenchyma are gorged with very minute solid particles of silt. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z They are the chief constituents of the fleshy parenchyma of fruits, tubers, rhizomes. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Microscopically the white pine can be distinguished by having usually only one large pit, while spruce shows three to five very small pits in the parenchyma cells of the pith ray communicating with the tracheid. Wood and Forest 2011-03-01T03:00:42.647Z At the beginning, either in the embryo or in an incipient shoot from a bud, the whole stem is of tender cellular tissue or parenchyma. The Elements of Botany For Beginners and For Schools The numerous small bumps in the palisade parenchyma cells are chloroplasts. Biology for AP Courses 2022-06-09T00:00:00Z When pigment is produced it takes the form of minute granules lying in the cells of the parenchyma, the dermal membrane being as a rule colourless. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z When the air-cells and parenchyma become inflamed, it is called inflammation of the lungs. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The receptacle proper comprehends the subhymenial tissue, the parenchyma, and the external membrane. Fungi: Their Nature and Uses The raphe runs through the parenchyma found in the cleft of the berry. All About Coffee Student D observed that parenchyma cells were the most abundant. Biology for AP Courses 2022-06-09T00:00:00Z It is apparently the latter, however, that give many otherwise colourless sponges a slight pinkish or yellowish tinge directly due to the presence in cells of the parenchyma of minute liquid globules. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The parenchyma cells of the medullary rays in oak do not cohere strongly and often check open, especially when steamed too severely. Seasoning of Wood The external membrane, which envelopes the parenchyma, and limits the hymenium, differs from the preceding by the cells often being polyhedric, sometimes transverse, and united together, and sometimes separable. Fungi: Their Nature and Uses The parenchyma, or palisade cells as they are called, is a thin-walled tissue in which the cells are elongated, from which fact they receive their name. All About Coffee Sclerenchyma would show the presence of labeled minerals and parenchyma would show the presence of radioactive sucrose. Biology for AP Courses 2022-06-09T00:00:00Z A section at this period closely resembles one of an adult sponge, except that the structure is more compact, the parenchyma being relatively bulky and the canals of small diameter. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The softwoods are made up chiefly of tracheids, or vertical cells closed at the ends, and of the relatively short parenchyma cells of the medullary rays which extend radially from the heart of the tree. Seasoning of Wood But when, in cutting the tuber, the parenchyma occupied by the mycelium is exposed to the contact of the air, it covers itself with conidia-bearing branches at the end of from twenty-four to forty-eight hours. Fungi: Their Nature and Uses In cross section this tissue resembles parenchyma, and appears as if it were made up of rounded cells. Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. It produces atelectasis followed by progressive necrosis of lung tissue with gradual liquefaction of the parenchyma. Pandemic It is remarkable for the enormous number of microscleres in its parenchyma. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z They contain not only rays, and in many cases tracheids, but also thick-walled cells called fibres and wood parenchyma for the storage of such foods as starches and sugars. Seasoning of Wood The parenchyma is seated beneath this, and is generally of interlaced filaments, of a looser consistency than the preceding, united by intermediate cellules. Fungi: Their Nature and Uses Another stem in which the vascular bundles are more or less peripheral in position and enclosing a wide parenchyma is that of Setaria glauca. A Handbook of Some South Indian Grasses Pores in late wood fewer and larger and rarely joined by tangential lines of wood parenchyma. Studies of Trees Bubble-cells Spherical cells of the parenchyma the contents of which consist of a drop of liquid covered by a thin film of protoplasm. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z They have only vessels, wood fibres, and a few parenchyma cells. Seasoning of Wood The cells of this parenchyma, well known among the features of gum disease, are cubical or polyhedral, thin walled, and rich in protoplasm. Scientific American Supplement, No. 441, June 14, 1884. In the secondary bundles the sclerenchyma band above is separated from the chlorophyllous layer by two layers of parenchyma. A Handbook of Some South Indian Grasses Wood parenchyma in numerous fine but distinct tangential lines. Studies of Trees Oscula star-shaped, of moderate size, as a rule rendered conspicuous by the furrows that radiate from them over the outer surface of the parenchyma below the external membrane; oscular collars well developed. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The porous spring-wood and radial gray tracts are partly composed of smaller vessels, but chiefly of tracheids, like those of pine, and of shorter cells, the "wood parenchyma," resembling the cells of the medullary rays. Seasoning of Wood It contains a pulpy parenchyma, soft, unctuous, very brown, in which are embedded black, brilliant, very small seeds. The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. As regards size, the epidermal cells overlying the sclerenchyma are small and those lying over parenchyma are larger. A Handbook of Some South Indian Grasses Wood parenchyma is found in all woods, arranged sometimes in tangential lines, sometimes surrounding the pores and sometimes distributed over the cross-section. Studies of Trees Flesh-spicules fairly numerous in the external membrane but by no means abundant in the parenchyma, very slender, gradually pointed, covered uniformly with minute but distinct spines. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z As the breadth of ring diminishes, this middle portion is reduced so that very slow growth produces comparatively light, porous wood composed of thin-walled vessels and wood parenchyma. The Mechanical Properties of Wood Including a Discussion of the Factors Affecting the Mechanical Properties, and Methods of Timber Testing The paddle-arms beat out the fecula from the fibres and parenchyma of the pulp, and discharge it in the form of a milk through the perforated bottom of the cylinder. The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. Still inside, at some distance from the sclerenchymatous band, are seen vascular bundles forming a row and enclosing a large space of the ground tissue consisting of only parenchyma. A Handbook of Some South Indian Grasses Coniferous woods have no pores, their rays are always narrow and inconspicuous, and wood parenchyma is never prominent. Studies of Trees One relatively large depressed osculum usually present in each sponge; pores inconspicuous; dermal membrane in close contact with the parenchyma. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The edible part of most fruits is, as the physiologist says, "the parenchyma or fleshy tissue of the leaf," of which they are formed. Excursions The peri-nuclear portion consists of soft-walled parenchyma, smaller near the nuclear sheath and the epidermis, and larger about midway between, and of the same character as the cells of the pith. Scientific American Supplement, No. 497, July 11, 1885 There is a sclerenchymatous ring close to the epidermis but separated from it by a few layers of parenchyma. A Handbook of Some South Indian Grasses Wood parenchyma around pores or extending wing-like from pores in late wood, often forming irregular tangential lines. Studies of Trees True flesh-spicules are usually absent, but more or less perfect birotulates exactly similar to those associated with the gemmules are often found free in the parenchyma. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It does not only exist in the saliva and the mucus of the mouth, but likewise in the blood and the parenchyma of the salivary glands; but not in the pulpy substance of the nerves. The Dog Which speaks of an intemperance in the splenetic parenchyma; that is to say, the spleen. The Imaginary Invalid It is the cell-sap of the ordinary cell tissue or parenchyma, which is colored by the anthocyan, and for this reason all organs possessing this tissue, may exhibit the color in question. Species and Varieties, Their Origin by Mutation Hickory is readily separated from ash by the fine tangential lines of wood parenchyma and from oak by the absence of large rays. Studies of Trees A. Microscleres of the parenchyma similar in general structure to those or the gemmule; the latter without comb-like vertical rows of spines at the ends Spongilla, p. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z At the centre of every leaf, no doubt from the effect of some disease of the parenchyma, concentric circles of alternate blue and yellow appear, the yellow prevailing towards the middle. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 In some of my cuttings of Beans, the stem cracked in four long lines before the roots had really formed, showing the parenchyma in small hillocks, so to speak. Outlines of Lessons in Botany, Part I; from Seed to Leaf The edible part of most fruits is, as the physiologist says, "the parenchyma or fleshy tissue of the leaf" of which they are formed. The Atlantic Monthly, Volume 10, No. 60, October, 1862 Does the humidity deposited on the parenchyma by the cooling of the leaves, which is the effect of the nocturnal radiation, prevent the action of the first rays of the sun? Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 They are apparently unable to attack a sponge so long as its external membrane is intact, but if this membrane is broken, they swarm round the sponge and devour the parenchyma greedily. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It is formed, according to Flahault, by the enlargement of the layers of the cortical parenchyma at the base of the hypocotyl. The Power of Movement in Plants The green flush sometimes seen on the surface of the typical form is due to the fact that the superficial cells of the parenchyma contain green corpuscles. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Gemmules small, bound together in pairs, as a rule free in the parenchyma but sometimes lightly attached at the base of the sponge. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The dark colour is due to minute masses of blackish pigment in the cells of the parenchyma. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z This appears to be due entirely to the absorption of minute particles of inorganic matter by the cells of the parenchyma. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Flesh-spicules straight, narrowly rhomboidal in outline, sharply pointed, slender, covered with minute, irregular, straight spines, scanty in the parenchyma, abundant in the external membrane. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The bulk of the skeleton had fallen away and the parenchyma had wholly perished. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z |
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