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Skin
Organ in the Integumentary System3 Layers (Epidermis,
Dermis, Hypodermis)
TERM 2
Benefits of Skin
DEFINITION 2
Protective outer covering to the bodyKeeps us warmMakes
vitamin D when exposed to UV lightWaterproofSensory
structure
TERM 3
Epidermis
DEFINITION 3
Most superficial layerKeratinized stratified squamous
epithelium
TERM 4
Epidermis: Stratum Corneum
DEFINITION 4
Many layers of flat dead cells packed with keratinLayer that
we shead
TERM 5
Epidermis: Stratum Lucidum
DEFINITION 5
Found only in palms of hands and soles of feetLucid (clear)
Epidermis: Stratum Granulosum
Cells look grainyWaterproof layerReleases oils
TERM 7
Epidermis: Stratum Spinosum
DEFINITION 7
Cells look spinySeveral layers thick
TERM 8
Epidermis: Stratum Basale
DEFINITION 8
DeepestAnchored to the basement membraneCells here get
all the nutrients so they are constantly active
TERM 9
Keratin
DEFINITION 9
Protein that resists abrasion and gives skin its leathery feel
TERM 10
Melanin
DEFINITION 10
Pigment
Hypodermis
DeepestConnective tissue: loose and adiposeProvides
insulation and cushioning
TERM 17
Hair
DEFINITION 17
Filament of keratinized cells (stratum corneum)
TERM 18
Hair Follicle
DEFINITION 18
Pouch or pocket of epidermis from which a hair arises
TERM 19
Arrector Pili Muscle
DEFINITION 19
Muscle that attaches to the follicle and pulls hair upright
when contracted (goose bumps)
TERM 20
Root Hair Plexus
DEFINITION 20
Network of nerves that wraps around the hair follicle
Vellus Hair
Short, fine hair found on arms/face of adults and bodies of
children
TERM 22
Terminal Hair
DEFINITION 22
Coarse, long hair found on scalps, armpits, and pubic region
TERM 23
Lanugo Hair
DEFINITION 23
Found covering the body of fetusProtects skin against
amniotic fluid
TERM 24
Hair: Active Growth Phase
DEFINITION 24
Hair follicle is busy building a hair filament
TERM 25
Hair: Resting Phase
DEFINITION 25
Dormant phase when hair is likely to fall out
Blister
Intact epidermis pulls away from dermis
TERM 32
Callus
DEFINITION 32
Localized thickening of the epidermis in response to
persistent stress
TERM 33
Stretch
Mark
DEFINITION 33
Dermis tears while epidermis remains intact
TERM 34
1st degree
burn
DEFINITION 34
Burn affects only the epidermisEx: Mild Sunburn
TERM 35
2nd degree
burn
DEFINITION 35
Burn affects both epidermis and dermisEx: Sun blisters
3rd degree
burn
Burn affects epidermis, dermis, and hypodermisSkin grafts
are usually needed
TERM 37
Basal Cell Carcinoma
DEFINITION 37
Bottom layer (stratum basale)Slow growing tumor
TERM 38
Squamous Cell Carcinoma
DEFINITION 38
Stratum Spinosum
TERM 39
Malignant Melanoma
DEFINITION 39
Tumor of the melanocytes
