physiology of the integumentary system
protection
the integumentary system performs many protective functions.
1.the intact skin plays an important role in preventing water loss because its lipids act as a barrier to the diffusion of water.
2.the skin prevents the entry of microorganisms and other foreign substances into the body.
secretions from skin glands also produce an environment unsuitable for some microorganisma.
3.the stratified squamous epithelium of the skin protects underlying structures against abrasion.
4.Melanin absorbs ultraviolet light and protects underlying structures from its damaging effects.