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  4. 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. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-c4qti0icpik6.png /> 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

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Q. 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 $B$
$\left(\right.1\left.\right)$ Ectoderm Endoderm Differentiated as embryo Get attach to the endometrium
$\left(\right.2\left.\right)$ Trophoblast Inner cell mass Differentiated as embryo Get attach to the endometrium
$\left(\right.3\left.\right)$ Inner cell mass Trophoblast Differentiated as embryo Get attach to the endometrium
$\left(\right.4\left.\right)$ Trophoblast Inner cell mass Get attach to the endometrium Differentiated as embryo

NTA AbhyasNTA Abhyas 2020Human Reproduction

Solution:

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.