Question

(a) Describe the different stages of development a fertilised ovum in a
human female undergoes up to the blastocyst stage.
(b) Name the parts of a blastocyst and write the fate of these parts till
the onset of pregnancy.
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Answer 1

Answer:

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A baby goes through several stages of development, beginning as a fertilized egg. The egg develops into a blastocyst, an embryo, then a fetus.....

It possesses an inner cell mass (ICM) which subsequently forms the embryo. The outer layer of the blastocyst consists of cells collectively called the trophoblast. This layer surrounds the inner cell mass and a fluid-filled cavity known as the blastocoel. The trophoblast gives rise to the placenta.....

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Answer 2

Answer:

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