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MBBS QUESTION #10159
Question 1
Which germ layer gives rise to the epidermis of the skin, the entire nervous system, and the lens of the eye?
  • Endoderm
  • Mesoderm
  • Ectoderm✔️
  • Trophoblast
Correct Answer Explanation
Ectoderm differentiates into surface ectoderm (epidermis, lens) and neuroectoderm (brain, spinal cord, peripheral nervous system), unlike mesoderm (muscle, bone, connective tissue, cardiovascular system) or endoderm (gut lining, associated glands).