(a) Name the stage of human embryo the figure represents. (b) Identify ‘a’ in the figure and mention its function.

Question

Study the figure given below and answer the questions that follow:

(a) Name the stage of human embryo the figure represents.

(b) Identify ‘a’ in the figure and mention its function.

(c) Mention the fate of the inner cell mass after implantation in the **.

(d) Where are the stem cells located in this embryo?

Answer 1

(a) Blastocyst

(b) ‘a’ is trophoblast. The trophoblast layer gets attached to endometrium and later form extra embryonic membrane namely chorionic villi.

(c) The inner cell mass differentiates into an outer layer ectoderm and a inner layer endoderm.

(d) Inner cell mass.