Question

How and when the formation of blastocyst takes place?

Answer 1

Blastulation:

• Formation of blastula/blastocyst from morula is known as blastulation.
• In human morula, the outer cuboidal cells become flattened when it reaches into the uterus.
• These flattened cells are called as Trophoblast, by which they adhere with uterine epithelium.
• Cleavage continued and a cluster of cells differentiates into two distinct groups, the epithelial-like trophoblast or nutritive cells surrounding the expanding cavity and inner cell mass of formative cells of the embryo.
• The cavity is called blastocoel and embryo is known as a blastocyst (a kind of blastula) in human.