| 单词 | vitellus |
| 例句 | Within the shell the animal portion of the egg is found; which consists of a viscous, colorless liquid called albumen, or the white, and a yellow globular mass called the vitellus, or yolk. Donahoe's Magazine, Volume XV, No. 3 Volume XV (Jan 1886-Jul 1886) 2012-01-23T03:00:12.223Z Now, the human ovum or egg consists of a vitellus or yolk, which is covered by a similar membrane, known as the vitelline. What a Young Husband Ought to Know As a consequence of this superficial concentration we get segmentation of the vitellus, with the production of a morula. The Mechanism of Life The literal references to the foregoing are: am, amnion; al, allantois; v, vitellus; h, encephalon; i, eye; c, heart; f, liver; g, gizzard; ms, upper, and mi, lower member. Was Man Created? The vitellus and the membrane of the egg enlarge with the embryo and absorb by endosmosis the nutritive matter necessary for the latter, contained in the maternal blood. The Sexual Question A Scientific, psychological, hygienic and sociological study Thus, in Fishes, the first changes consist in the segmentation of the vitellus and the formation of a germ, processes which are common to all classes of animals. Facts and Arguments for Darwin Up to this point the vitellus of the egg, nourished by endosmosis through its membranes, had sufficed for the nutrition of the still very small embryo. The Sexual Question A Scientific, psychological, hygienic and sociological study |
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