blastoderm 的定义
Embryology.
- the primitive layer of cells that results from the segmentation of the ovum.
- the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass.
更多blastoderm例句
- For hardening the blastoderm I have employed, as usual, chromic acid, and also gold chloride.
- If the outlines only of the cells are to be examined, a very short immersion (half a minute) of the blastoderm in a half per cent.
- My observations begin with the blastoderm of a freshly laid egg.
- The changes which the blastoderm undergoes during the first three or four hours of incubation are not very noticeable.
- I have already spoken of the gradation of the hypoblast at the edge of the blastoderm into white yolk.