A&P chapter 6-
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A&P chapter 6-
fortis herzog anantomy
made up of the skin itself, and the accessory structures like lair, fingernails, sensory receptors and glands.
Skin 3 layers
epidermis, dermis, subcutaneous
outer layer composed of stratified squamous epithelium
-lacks blood vessels
thicker than epidermis
-protects us from and controls temperature
-provides blood supply to skin
-made up of loose connective tissue, elastic fibers, epithelium, muscle, nerves and blood
-contains neurons (sensory receptors).
loose connective tissue in teh form of adipose tissue.
- no sharp bundary between the dermis and subcutaneous
-insulates from too much heat or too little, provudes blood supply to the skin, nerve sensory receptors
an extension of the stratified squamous epithelium
an extension of stratified squamous epithelium
-all over body besides hand and feet palms
-erector pilli muscle
usually found in close proximity to hair folicles
-releases sebum which protects, moistens and keep skin soft.
-secrete sweat which is mostly water
-cools the skin
-sweat has some waste products, salt, etc
cutaneous carcinomas and cutaneous melanomas
most common, occur within people with prolonged exposure to lots of sunlight.
-long term exposure- cells divide to replace sun burn damage, don't undergo apoptosis
normally people that have strong acute exposures to the sun are at risk, melanomas are typically more dangerous