| text |
| GrayAnatomy |
12 |
In reptiles, birds, and many mammals the allantois becomes expanded into a vesicle which projects in |
3 |
380 |
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| GrayAnatomy |
11 |
The yolk-sac (Figs. 22 and 23) is situated on the ventral aspect of the embryo; it is lined by entod |
3 |
27 |
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| GrayAnatomy |
5 |
Fertilization consists in the union of the spermatozoön with the mature ovum (Fig. 8). Nothing is kn |
3 |
39 |
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| GrayAnatomy |
14 |
In the human embryo described by Peters the mesoderm outside the embryonic disk is split into two la |
3 |
76 |
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| GrayAnatomy |
7 |
In front of the primitive streak two longitudinal ridges, caused by a folding up of the ectoderm, ma |
3 |
53 |
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| GrayAnatomy |
8 |
The notochord (Fig. 19) consists of a rod of cells situated on the ventral aspect of the neural tube |
3 |
26 |
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| GrayAnatomy |
15 |
—It is during this month that the first movements of the fetus are usually observed. The eruption of |
3 |
29 |
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| GrayAnatomy |
10 |
The embryo increases rapidly in size, but the circumference of the embryonic disk, or line of meetin |
3 |
32 |
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| GrayAnatomy |
9 |
Toward the end of the second week transverse segmentation of the paraxial mesoderm begins, and it is |
3 |
18 |
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| GrayAnatomy |
6 |
The early segmentation of the human ovum has not yet been observed, but judging from what is known t |
3 |
182 |
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