Below figure represents one of the stages of embryo development in human. Determine the row that correctly identifies the labels A and B with their respective functions.

Question

	$A$	$B$	Function of $A$	Function of $B$
$(1)$	Ectoderm	Endoderm	Differentiated as embryo	Get attach to the endometrium
$(2)$	Trophoblast	Inner cell mass	Differentiated as embryo	Get attach to the endometrium
$(3)$	Inner cell mass	Trophoblast	Differentiated as embryo	Get attach to the endometrium
$(4)$	Trophoblast	Inner cell mass	Get attach to the endometrium	Differentiated as embryo

TestHub · Accepted Answer

In the development of the embryonic stage, the morula staged group of cells (blastomeres) change into blastocyst. The cells within this form an outer layer called trophoblast - attaches to the endometrium of uterus. The inner cells of the structure form the inner cell mass which later differentiates into embryo proper.

Zoology - Human Reproduction Question with Solution | TestHub

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