Embryology and Physiology of the Skin

Question 1

Which germ layer does apocrine, sweat and sebaceous glands arise from?

Answer 1

Ectoderm

Question 2

Which germ layer gives rise to nails and mammary glands?

Answer 2

Ectoderm

Question 3

Which germ layer gives rise to hair follicles and teeth?

Answer 3

Components of both the ectoderm and mesoderm

Question 4

Melanocytes arise from which germ layer?

Answer 4

Ectoderm (neural crest)

Question 5

Why do blue naevi tend to occur only on the head/neck, dorsal aspects of the distal extremities and the pre-sacral area?

Answer 5

These are the only sites that dermal melanocytes remain active after birth