chapter 16 skin med term 1

cuticle

a narrow band of epidermis at the base and sides of the nail plate

dermis

middle layer of the skin

sebum

oily substance secreted by sebaceous glands

epidermis

outermost layer of the skin

keratin

hard protein material found in the epidermis, hair, and nails. means horn, commonly found in the horns of animals

stratum

a layer (of cells)

corneum

the outermost layer of the epidermis, consists of flattened keratinized cells

collagen

structural protein found in the skin and connective tissue

subcutaneous layer

innermost layer of the skin, containing fat tissue

paronychium

soft tissue surrounding the nail border

Lunula

half moon shaped, whitish area at the base of a nail

macula

flat, discolored, localized change of skin color that’s not elevated or depressed

fissure

groove or crack-like sore

pustule

papule containing pus

ulcer

open sore on the skin or mucous membranes (deeper erosion)