SIZE: 0.1 - 0.2 mm
Trophoblast cells continue to engulf and destroy cells of the uterine lining creating blood pools and stimulating new capillaries to grow - beginning the growth of the placenta.
The blastocyst inner cell mass differentiates into two layers:
EPIBLAST The top layer of cells (dark blue) which will become the embryo and amniotic cavity.
HYPOBLAST Lower layer of cells (yellow) which become the yolk sac.
|original work, are licensed under a|
Content protected under a Creative Commons License. No dirivative works may be made or used for commercial purposes.