NEETZoologyHuman Reproduction
What are the three layers that give rise to all tissues (organs) in adults?
Options
- AEndoderm, mesoderm, and trophoblast
- BTrophoblast, chorionic villi, and ectoderm
- CEctoderm, mesoderm, and endoderm
- DChorionic villi, inner cell mass, and ectoderm
Correct answer
C. Ectoderm, mesoderm, and endoderm
Step-by-step solution
Immediately after implantation, the inner cell mass (embryo) differentiates Figure 2.12 The human foetus within the uterus into an outer layer called ectoderm and an inner layer called endoderm. A mesoderm soon appears between the ectoderm and the endoderm . These three layers give rise to all tissues (organs) in adults. It needs to be mentioned here that the inner cell mass contains certain cells called stem cells which have the potency to give rise to all the tissues and organs.