T.S OF BLASTOCYST SPOTTING 12 ISC BOARD PRACTICAL EXAM 2020
У вашего броузера проблема в совместимости с HTML5
The blastocyst is a structure formed in the early development of mammals. It possesses an inner cell mass (ICM) which subsequently forms the embryo. The outer layer of the blastocystconsists of cells collectively called the trophoblast. ... The trophoblast gives rise to the placenta.