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The integumentary system
skin
9
Anatomy
Undergraduate 1
04/21/2012

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Term
epidermis
Definition
outermost layers of skin, stratified sq. e. , composed of keritinocytes and keritinized skin cells, reg. water, temperature, protects agains infection/disease
Term
dermis
Definition
layer of skin between the epidermis and the subcutaneous tissues, papillary region, reticular dermis, connected to the epidermis by a basal lamina CT (collagen/elastic fibers)
Term
subcutaneous
Definition
aka the hypodermis, lowermost layer of the skin, fibroblasts, adipose cells, and macrophages found here
Term
sensory receptors in skin
Definition
meissner's corpuscles: sensitivity to light and touch
pacinian corpuscles: sensitivity to vibration and pressure
ruffini's end organ: sustained pressure
merkel's disc: sustained touch and pressure
Term
dermal papillae
Definition
small extensions of the dermis (blood supply) into the epidermis in order to supply the epidermis with nutrients
Term
hair follicles
Definition
skin organ that produces hair
Term
arrector pili muscles
Definition
small smooth muscles attached to hair follicles, involuntary response to stresses (cold, fear)
Term
sweat glands
Definition
small tubular structures of the skin that produce sweat
1. eccrine
2. apocrine
Term
sebaceous glands
Definition
produce oil/waxy solution called sebum, to lubricate and waterproof the skin/hair of mammals
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