blastocyst lietuviškai

Paaiškinimas anglų kalba

• the blastula of mammals
• the blastula of a placental mammal in which some differentiation of cells has occurred
• A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.