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group of tissues that work together to perform closely related functions

Integumentary System

organ system that includes har, skin, and nails and protects the body from pathogens and maintains homeostasis


outer layer of skin


the deep vascular inner layer of the skin

Subcutaneous Layer

connective and adipose tissue layer just under the dermis


older cells harden in this process, process by which the cells of epidermis become filled with keratin and move to the surface, where they are sloughed off


a pigment that gives the skin its color


beneath the skin


inner layer of the skin


outer layer of the skin


tubelike depression in which a hair develops


protein produced as epidermal cells die and harden


dark pigment produced by certain cells


Gland that secretes an oily substance

Hair Follicle

a small tubular cavity containing the root of a hair


Melanin that give brown and black color to hair


melanin that provides natural hair colors from red and ginger to yellow/blond tones

Sebaceous Glands

secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis

Sweat Glands

glands of the skin that secrete small amounts of water to the skins surface

Eccrine Galnds

most abundent sweat glands, respond throught life to body temperature elevated by environmental heat or physical exercise.

Apocrine Glands

sweat glands in the pubic and underarm areas that secrete thicker sweat, that produce odor when come in contact with bacteria on the skin

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