| primitive streak |
This develops in an embryo at about day 14 when the cells separate into 2 groups: those that will eventually become a foetus; and those which will form the placenta and umbilical cord.
출처: www.hc-sc.gc.ca/english/media/releases/2002/2002_3...
|
|---|---|
| primitive streak |
Thickening in surface of embryos which results in the first clearly recognisable stage in embryonic development.
출처: www.hfea.gov.uk/Glossary
|
| primitive streak |
A vertical, opaque line where the embryo begins to grow and develop.
출처: www.urbanext.uiuc.edu/eggs/res02-definitions.html
|
| primitive streak |
A faint white trace at the caudal end of the embryonic disc, formed by the movement of cells at the beginning of the mesoderm formation. It provides the earliest indication of the embryonic axis.
출처: nmhm.washingtondc.museum/collections/hdac/Glossary...
|