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33 Cards in this Set
- Front
- Back
Integumentary System
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The skin or the largest organ in the body.
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Synthesizes
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Produces vitamin D when exposed to light.
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Epidermis
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Outer layer that is mostly thin.
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Important fuctions of the skin:
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Protecting the body against UV rays, regulating body temp, and preventing dehydration.
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Strata
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Sublayers of the epidermis.
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Stratum corneum and basal layer
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Deepest layer and most important.
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Stratum corneum
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Composed of dead flat cells that lack a blood supply and sensory receptors.
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Basal layer
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Only layer of the epidermis that is composed of living cells where new cells are formed.
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Synthesize
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To produce by synthesis.
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Keratin
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Hard protein material.
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Melanocytes
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Special cells that produce a black pigment called melanin
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Melanin
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Provides a protective barrier from the damaging effects of the sun's UV.
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Albino
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Individual who cannot produce melanin has a marked deficiency of pigment in the eyes, hair, and skin.
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Dermis
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Second layer of skin also called corium. Lies beneath the epidermis and is composed of living tissues.
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Sebaceous
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Oil glands.
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Sudoriferous
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Sweat glands.
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Subcutaneous layer
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Called hypodermis binds the dermis to underlying structures.
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Adipose
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Fat tissue.
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Homeostasis
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Same, alike, standing still.
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Exocrine glands
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Secrete substances through ducts to an outer surface of the body rather than directly into the bloodstream.
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Axillae
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Armpits
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Sebum
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Oily secretion.
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Ductules
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Ducts.
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Androgens
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Regulate production and secretion of sebum.
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Hair shaft
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Part that is embedded in the dermis is the hair root.
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Hair follicle
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Root, together with its covering.
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Papilla
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Loop of capillaries enclosed in a covering.
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Alopecia
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Baldness
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Nails
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Protect the tips of the fingers and toes from bruises and injuries.
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Nail root
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Composed of keratinized stratified squamous epithelial cells producing a very tough covering.
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Nail bed
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Layer of epithelium.
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Nail body
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Appears pink because of the underlying vascular tissue.
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Lunula
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Half-moon-shaped area is the region where new growth occurs.
Has whitish appearance because the vascular tissue underneath does not show through. |