Retina, eye lens, brain and skin are formed from

Options

A. Mesoderm
B. Ectoderm
C. Endoderm
D. Both ectoderm and endoderm

Answer

B

Explanation

Derivatives of Ectoderm
1. Epidermis of skin and epidermal derivates like hair, nails, sweat glands, sebaceous glands
2. Enamel of teeth, salivary glands, mammary glands.
3. Neural system including all neurons, brain, spinal cord.
4. Lens, cornea, retina, conjunctiva, muscles of iris.
5. Pituitary, pineal and adrenial medulla.
6. External car, internal car (membranous labyrinth)
7. Terminal part of male urethra.
8. Nasal cavity, olfactory epithelium.
9. Proctodaeum and stomodaeum.
10. Neural tube.
11. Branchial arches.