| 单词 | hypoblast |
| 例句 | 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 The layer of cells lining the cavity of the sack is known as the hypoblast, and gives rise chiefly to the cells lining the alimentary canal of the future animal. The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development 2011-08-29T02:01:04.170Z This process must be regarded as equivalent to the first stage of invagination, the yolk being surrounded by hypoblast cells or their nuclei. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Though it would enforce the argument, I must, for brevity's sake, pass over the analogous evolution of that introverted layer, or hypoblast, out of which the alimentary canal and attached organs arise. Essays: Scientific, Political, & Speculative, Vol. I 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 Epiblast is indicated by a line of dashes, mesoblast by dots, and hypoblast, dark or black. Text Book of Biology, Part 1: Vertebrata Hertwig says that all the cells of the epiblast, hypoblast, mesoblast, and of the later derivatives of these primary layers, receive identical portions of germplasm by means of doubling nuclear divisions. The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development 2011-08-29T02:01:04.170Z In all the higher animals a layer of cells makes its appearance between the hypoblast and the epiblast, and is termed the mesoblast. Darwiniana : Essays — Volume 02 The former is often also called the ectoblast, or epiblast, and the latter the endoblast, or hypoblast. The Evolution of Man — Volume 1 The hypoblast is the lining of the intestine and of the glands which open into it; and the material of the notochord is also regarded, as hypoblast. Text Book of Biology, Part 1: Vertebrata The blastosphere of the frog is like what the blastosphere of amphioxus would be, if the future hypoblast cells were enormously larger through their protoplasm being diluted with yolk. Text Book of Biology, Part 1: Vertebrata This cavity is the primitive alimentary cavity or archenteron; the inner or invaginated layer is the hypoblast; the outer the epiblast; and the embryo, in this stage, is termed a gastrula. Darwiniana : Essays — Volume 02 |
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