Integumentary System

• Cutaneous membrane
• Serous membrane
• Mucous membrane

• parietal: lines the walls of a body cavity
• visceral: covers the surface of organs found in the body

the transitional area that serves as a point of "fusion" where skin and mucous membranes meet

line the spaces between bones and joints

cushion like sacs that are found between many moving body parts

a thick color-less lubricating fluid secreted by synovial membranes

oil glands

• Epidermis - outermost layer
• Dermis - deeper of the two is thicker made up largely of connective tissue

• thick layer of loose connective tissue and fat
• fat in this layer insulates the body from extreme heat and cold

innermost layer of the epidermis

a tough, waterproof material that provides cells in the outer layer with a horny, abrasion-resistant, and protective quality.

tough outer layer of the epidermis

the junction between the thin epidermal layer of the skin above and the dermal layer below

• the upper region of the dermis characterized by rows of tiny bumps called dermal papillae
• dermal papillae - form the ridges and grooves that make up your fingerprints

deeper area of dermis filled with a dense network of interlacing collagen fibers

a small, cap-shaped cluster of cells where hair growth begins

• goose bumps
• Latin meaning "errectors of the hair"

receptor that is capable of detecting pressure on the surface of the skin

receptor capable of detecting both light and touch

receptors that repsond to pain

receptors that detect low frequency vibration

• eccrine sweat glands - far more numerous, important, and wide-spread in the body - produces sweat
• apocrine sweat glands - found primarily in the armpit and around the gential area - begin to function in puberty

• secrete oil for the hair and skin called sebum (which lubricates hair and skin)
• grow where hair grows