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Chapter 4
Stuctures and Functions
Question | Answer |
---|---|
Epidermis | Thin outer layer of skin consisting of nonliving , keratinized cells. Provides, protection, secretion and absorbtion |
Basement membrane | bottom layer of skin that produces new epidermal cells |
Dermis | lies beneath the epidermis and is much thicker, made up of fibrous connective tissue containing elastin providing elasticity and collagen as strength. |
subcutaneous layer | beneath the dermis, contains fat tissue, deep blood vessels, nerves, lower part of hair follicles, elastin and collagen. Provides insulation for deeper stuctures |
sudoriferous (sweat) glands | an accessory structure; located throughout the body but more concentrated in feet and palms. |
sebaceous glands | base of the hair follicles all over the body; secrete an oily substance called sebum. |
Sebum | an oily substances that is secreted by the subaceous gland; when skin breaks, oil keeps bacteria from growing and is used as a lubricate. |
laceration | cut or tear in the flesh |
abrasion | an area where skin of mucous membranes are scraped away. |
edema | swelling |
erythema | redness |
leukocytes | white blood cells that attack bacterium; increases circulation that speeds up healing |
melanocytes | pigment producing skin cells called melanin that gives skin its color |
Reflex | a response that is so quick you cannot think about it; for protection |
Hair | part of the integumentary system; serves as a protective function, filters and protects from debris and dust, keep head warm, made up of protein called keratin. |
Nails | help protect ends of the fingers and toes; nail forms at the nail rootand made up of keratinized squamous epithelial cells |
adip | fat |
lip | tumor of fat |
cutane | skin |
derm | surgical repair of skin |
dermat | specialists in the study of the skin |
cyt | study of cells |
eti | study of cause |