Thermoregulation

Arteriole

Supplies oxygenated blood to the capillary loop

Erector pili muscles

When contracting it raised the hair, on relaxing lowers the hair

Capillary loop

When arteriole vasodilates, blood flow through them so more heat is lost from epidermis from radiation (less blood through shunt vessel)

Shunt vessel

Links an artery to a vein allowing blood to bypass capillaries

Latent heat of evaporation

Sweat from the sweat gland moves to the skin's surface via sweat pores. The sweat evaporates to have a cooling effect on the body as it uses hear from it