The thin-walled hollow structure in early embryonic development that contains a cluster of cells is called

Blastocyst

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Ovum

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Morula

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Trophoblast

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Solution

The correct option is A
Blastocyst

A blastocyst forms when a fertilised egg is in its second phase of growth. This takes place between the fifth to the ninth day after fertilisation. Blastocyst is a distinctive stage of a mammalian embryo. It is a form of blastula that develops from a berrylike cluster of cells. A cavity appears in the morula between the cells of the inner cell mass and the enveloping layer. This cavity becomes filled with fluid.

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Similar questions

Which is correct about human embryonic development a)cleavage divisions brings about considerable increase in mass of protoplasm

b)in the second division, one of the two blastomeres usually divides a little sooner than the second

c)with more cleavage division, the resultant blastomeres becomes larger and larger

d)cleavage division result in hollow ball of cells called morula

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