Question

How is the blastocoel formed?

Answer 1

In a process called cavitation, the trophoblast cells secrete fluid into the morula to create a blastocoel, the fluid-filled cavity. ... As the embryo further divides, the blastocoel expands and the inner cell mass is positioned on one side of the trophoblast cellsforming a mammalian blastula, called a blastocyst.

Answer 2

ANSWER

Embryo development begins with a sperm fertilizing an egg to become a zygote which undergoes many cleavages to develop into a ball of cells called a morula. Only when the blastocoele is formed does the early embryo become a blastula. ... In mammals the blastula is referred to as a blastocyst.

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