Question

Olfactory epithelium develops from

• A. Embryonic endoderm
• B. Embryonic ectoderm
• C. Embryonic mesoderm
• D. Embryonic mesenchyme

Answer 1

Answer: (B)

Embryonic ectoderm

The inner cell mass of the blastocyst after implantation differentiates into an outer ectoderm, middle mesoderm and inner endoderm. Ectoderm forms the outer linings like the epithelium, brain, spinal cord, nerves, ears, nose, retina, nails and hair. Olfactory epithelium has sensory cells known as odorant receptors which act as a sensory organ for olfactory sensation.

So the correct answer is B.