Functions - Cutaneous Sensation, Vitamin D Synthesis, Blood Reservoir, Excretion, & Absorption

Contaneous Sensation

The skin contains exteroreceptors that allow us to sense the environment.

Contaneous Sensation Exteroreceptors:

Tactile receptors, thermoreceptors, nociceptors

Contaneous Sensation Exteroreceptors: Tactile Receptors

For touch, pressure, vibration, itch, and tickling

Contaneous Sensation Exteroreceptors: Thermoreceptors

Detect temperature

Contaneous Sensation Exteroreceptors: Nociceptors

Sense pain

Vitamin D synthesis function

Small amounts of UV light stimulate the production of vitamin D precursors in the skin.

Blood Reservoir - Function

The skin can store blood and redirect it as needed.

Excretion - Function

The skin helps with the excretion of water (300-400 mL daily) through evaporation and sweat, along with small amounts of salts, carbon dioxide, urea, and ammonia.

Absorption

The skin can absorb lipid-soluble substances, gases, and toxic substances.

Absorption - Lipid Soluble substances

Vitamins A,D,E,K cortisone,

Absorption - Gases

Carbon Dioxide and Oxygen

Absorption - Toxic Substances

Lead, mercury, arsenic, and compounds from poison ivy and oak.