Integumentary System Outline Health Occ Integumentary System l

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Integumentary System Outline Health Occ

Integumentary System Outline Health Occ

Integumentary System l Composed of Skin l Accessory structures l l Accessory hair l

Integumentary System l Composed of Skin l Accessory structures l l Accessory hair l Nails l Glands l nerves l structures include

Integumentary System l Main Functions Cover and protect the body l Help regulate the

Integumentary System l Main Functions Cover and protect the body l Help regulate the body’s temperature l Excretes some of the body’s waste materials l Includes sensors for pain and sensation l

Skin l Functions l l l Protects the body from injury protects the body

Skin l Functions l l l Protects the body from injury protects the body from the intrusion of harmful microorganisms Protects the body from the ultraviolet (UV) rays of the sun helps to maintain proper internal temperature of the body Serves as a site for excretion of waste through perspiration serves as an important sensory organ

Skin l Covers l 17 to 20 square feet l Variations of Thickness 1/50

Skin l Covers l 17 to 20 square feet l Variations of Thickness 1/50 inch to ¼ inch thick l The skin on the back upper back is 10 times thicker than the skin on the eyelid l

Skin l Layers of the skin and what they are composed of Epidermis l

Skin l Layers of the skin and what they are composed of Epidermis l Dermis l Subcutaneous l

Epidermis l Outer layer of skin l 2 sub layers: stratum corneum, stratum germinativum

Epidermis l Outer layer of skin l 2 sub layers: stratum corneum, stratum germinativum l Dead skin cells, melanin, 90% water repellant

Dermis l Makes ridges known as fingerprints l Blood vessels, nerve endings, sebaceous and

Dermis l Makes ridges known as fingerprints l Blood vessels, nerve endings, sebaceous and sweat glands, hair follicles

Subcutaneous l Fatty and fibrous tissue, blood vessels and nerves l Fatty layer protects

Subcutaneous l Fatty and fibrous tissue, blood vessels and nerves l Fatty layer protects inner organs and maintains body temp.

Hair l Pilus l Hair l Where l All areas except soles of feet

Hair l Pilus l Hair l Where l All areas except soles of feet and palms l Visible l you do/don’t have hair shaft Portion

Hair l The root l l Oil glands l l Attached to each hair

Hair l The root l l Oil glands l l Attached to each hair Melanin l l l follicle Determines hair color No melanin = gray hair Baldness (alopecia) l Heredity, result of disease, injury, or medical treatment

Glands l Three types of glands Sebaceous l Sudoriferous l ceruminous l

Glands l Three types of glands Sebaceous l Sudoriferous l ceruminous l

Sebaceous l Dermis, base of hair follicles l Secrete sebum l Lubricates, softens, and

Sebaceous l Dermis, base of hair follicles l Secrete sebum l Lubricates, softens, and protects skin from bacteria and fungi

Sudoriferous (sweat glands) l Found almost everywhere l Cools the body l Diaphoresis =

Sudoriferous (sweat glands) l Found almost everywhere l Cools the body l Diaphoresis = sweating

Ceruminous l Found in the auditory canal of ear l Secrete wax l Protects

Ceruminous l Found in the auditory canal of ear l Secrete wax l Protects ear from infection

Nails l Function l l Formed from l l Protection Help with grasping objects

Nails l Function l l Formed from l l Protection Help with grasping objects Allow us to scratch Hard keratin Lunula l Crescent shaped white area