inveigh
发表于 2025-3-25 05:27:03
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共同给与
发表于 2025-3-25 07:45:16
Mit Erfolg zur Professur oder DozenturDespite its short duration, the embryonic period is of fundamental importance, as the embryo acquires its almost definitive form . and builds the main outlines of its organs .. During the long fetal period which follows, the organs undergo little more than maturation at the histological level ..
古文字学
发表于 2025-3-25 15:17:14
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埋葬
发表于 2025-3-25 17:29:01
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GRAZE
发表于 2025-3-25 21:28:06
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健忘症
发表于 2025-3-26 01:43:34
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时代错误
发表于 2025-3-26 07:29:21
First Week of Development,The fertilized ovum, through cleavage, reaches the . stage. Then, forming a central cavity, it becomes a ., which implants itself in the uterine mucosa on the 6th day.
Medicare
发表于 2025-3-26 11:10:58
Second Week: Formation of the Embryonic Disc,At the end of the first week, the blastocyst is in the embryoblast stage (fig. 1). During the second week, the . (fig. 1), then the . (fig. 3) are differentiated successively from the lower part of this cellular mass, while the egg buries itself in the uterine mucosa (fig. 2).
拔出
发表于 2025-3-26 15:58:51
Third Week: Gastrulation,At the beginning of the 3rd week, an important process occurs: ., the formation of the third layer of the embryo, the ..
Nibble
发表于 2025-3-26 20:22:43
Destiny of the Three Germ Layers,At the end of gastrulation, the three germ layers are in place.