Integumentary system

By. Jessica Lee

overall functions

Integumentary works as the physical barrier of our body from the outside environment. It functions to retain body fluids, protect against disease and UV radiation from the sun, eliminate waste products, and regulate body temperature. It also stores water and fats and acts as a receptor for touch, pressure, pain, heat, and cold.

organs/individual roles/specialized cells

Skin, hair, nails, sweat, and oil glands make up the integumentary system. Skin is the gateway through which sensations are transmitted to the nervous system. It has two main layers called epidermis and dermis. Epidermis is the outer layer of the skin and has two layers. outside layer is composed of dead cells and the cells make keratin which is a tough, fibrous protein. The souter layer is hsed every 4-5 weeks. Inside layer is composed of living cells. Epidermis also contains melanocytes, cells that produce melanin, a dark brown pigment. Dermis is the inner layere of the skin that contains collagen fibers, blood vessels, nerve endings, glands, sense organs, smooth muscles, and hair follicles. There are two types of glands and they are sweat and oil which release products through holes in the epidermis. Hair and nails are made of keratin. Hair is on almost every exposed body surface. They are produced by hair follicles. Nails are to protect the fingers and toes and it grows about 3 millimeters a month.


Integumentary and circulatory systems regulate tempearture. Capillaries near the surface of the skin open to cool off and close to conserve heat.