Medicine and Health related Information

Blastocyst

Blastocyst is a spherical cyst lined by flattened trophoblastic cells and inside it there is a mass of cells, the INNER CELL MASS, attached eccentrically to the trophoblast. Further changes are as follows:- a) Some cells of the inner cell mass diffrentiate into flattened cells that to line its free surface. These constitute the ENDODERM- [...]

Continue reading...

Primitive Streak

At one circular area near the margin of the disc the cubical cells of the endoderm become columnar. This area is called “PROCHARDAL PLATE.” The appearance of the prochardal plate determines the central axis of the embryo and also enables us to distinguish its head and tail ends.

Continue reading...