BIOL-2220 Chapter Notes - Chapter 5: Acne Vulgaris, Evaporation, Heredity
24 Sep 2016
School
Department
Course
Professor
Document Summary
The skin and its derivatives (sweat and oil glands, hairs, and nails) make up a complex set of organs that serves several functions, mostly protective. 5. 1 the skin consists of two layers: the epidermis and dermis. Pliable yet tough, it takes constant punishment from external agents. Without our skin, we would quickly fall prey to bacteria and perish from water and heat loss. The skin is composed of two distinct layers. The epidermis, composed of epithelial cells, is the outermost protective shield of the body. The underlying dermis, making up the bulk of the skin, is a tough, leathery layer composed mostly of dense connective tissue. Nutrients reach the epidermis by diffusing through the tissue fluid from blood vessels in the dermis. The subcutaneous tissue just deep to the skin is known as the hypodermis. Also called superficial fascia, it is superficial to the tough connective tissue wrapping (fascia) of the skeletal muscles, consists mostly of adipose tissue.
