hair & scalp

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Last updated 2:17 PM on 10/15/26
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18 Terms

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What are the 3 layers of the hairshaft

Cuticle - cortex - medulla

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Sebaceous gland

Creates sebum

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Dermal papilla

Supplies nutrients & growth signals to the matrix

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Anagen

Active growth

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Catagen

Transition

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Telogen

Resting

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Exogen

Shedding

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Texture

Strand thickness

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Desnity

amount of strands in 1 square inch

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Hair porosity

How easy hair absorbs moisture

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Tinea capitis

Ringworm

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Cuticle

Outermost layer of keratin cells that protect the inner layers from environmental damage

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Cortex

The thickest layer containing keratin fibers and melanin pigment- determines hair strength, elasticity, color

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Medulla

Inner most core, made of loosely packed cells

(Often absent in fine or light hairs)

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Arrector pili

Causes goosebumps

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Epidermis (outermost layer)

Protective barrier, does not contain blood vessels

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Dermis (middle layer)

Structural strength, elasticity, & support

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Hypodermis ( subcutaneous lyer)

Deepest layer of skin

Regulates body temperature, SHOCK ABSORBER