10 mnth old infant bought in a sveltering day in june. He is listless cranky n floppy.He has no hair or teeth. Over the past two weeks he has not smiled,babbled rooled or attempted to stand. The mother says that both she and her son cannot tolerate heat and she has always had thin hair and still some baby teeth.Which is absent or decreased in mother and child??
1.langerhan cells
2.merkel cells.
3.pacinian corposcles.
4. sebaceous glands.
5. sweat glands.

ectodermal dysplasia