Integumentary System (basics)

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Last updated 10:14 AM on 9/22/26
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6 Terms

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Integumentary major regions

epidermis (outerlayer)
dermis (middle region)

hypodermis (subcuntaneous)

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function of integumentary system

protection

regulates body temp.

sensation fo touch anf pain

prevents excess water loss

synthesizes vitamin D

Blood reservoir
Excrretion

3
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Layers of Epidermis

(top to bottom)

Stratum corneum
Stratum lucidum
Stratum granulosum
Stratum spinosum
Stratum basale

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Layers of Dermis

Papillary region
— areolar CTP

— peglike projections called dermal papillae (fingerprints)
Recticular region

— dense irregular CTP
— 80% of the thickness in skin

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Hair

has hard keratine
made up of:

— shaft projecting from skin
— root embedded in the skin
arrector pili muscle attaches to hair

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nail

free edge, body, nail bed