Question

State any two functions of the mammalian skin other than those concerned with heat regulation

Answer 1

1.Protection

Example(s) include protection of the body from:

• ultraviolet (UV) radiation e.g. sun damage
• dehydration
• microorganisms
  e.g. bacterial invasion
• mechanical trauma / physical injuries

2. Sensation

Example(s):

• pressure / touch
• heat / cold
• pain

How does the skin perform this function?

• Somatic sensory receptors

3. Immunity

Example(s): include destruction of microorganisms & the interaction of skin with the body's immune system

How does the skin perform this function?

• Langerhans cells (of the epidermis)
• Phagocytic cells
• Epidermal dendritic cells

4.Excretion

Example(s):

Excretion of water, urea, ammonia and uric acid

How does the skin perform this function?

• Waste products released from the body via the surface of the skin, regulated by the volume and composition of sweat