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Nat. Review chpt. 4
Integumentary system
| Question | Answer |
|---|---|
| Epidermis | Skin; composed mostly of squamous cells |
| Stratum corneum | Outermost layer of skin |
| Keratin | A protein found in the stratum corneum |
| Stratum basale | Innermost layer of skin |
| Melanin | A dark pigment to the skin and hair |
| Dermis | Layer below the skin |
| Arrector pili | Muscle attatched to the root of the hair |
| Blood vessels | Bring blood to the skin and regulate body temperature |
| Nerve endings | Sensory receptors for pressure, temperature, and pain |
| Subcutaneous layer | Last layer of the integumentary system composed mostly of connective tissues and blood vessels |
| Integumentary system | Skin and it's appendages |
| Sebaceous glands | Glands located along the shaft of the hair, secrete an oily substance |
| Sudoriferous glands | Secrete sweat |
| Eccrine glands | Most numerous type of sweat gland |
| Apocrine glands | Larger sweat glands located in axillary and pubic regions |
| Mammary glands | Secrete milk |
| Ceruminous glands | Located in the ear canal, secrete wax |
| Hair | Consist of shaft, root and bulb, provide limited protection |
| Fingernails and toenails | Hardened layer of stratum corneum, helps protect and aids in picking up |
| What are the functions of the integumentary system? | Protection, temperature regulation, sensory reception, and cutaneous absorption |
| How does the integumentary system protect against? | Dehydration and invasion of pathogenic organisms |
| how does the integumentary system provide temperature regulation? | It produces and secretes sweat and diverts blood to the superficial layers to dissipate heat |
| How does the integumentary system provide sensory reception? | Through receptors that respond to pain, touch, pressure, and temperature. |
| What does the integumentary system absorb through cutaneous absorption? | Ultraviolet light, some oxygen, and some carbon dioxide |
| Integumentary system | Skin and appendages of the skin |
| Stratum germinatium | Stratum basale, cells produced here |
| Melanocytes | Produce melanin |
| Melanin | A brownish pigment that helps protect from UV light |
| Cyanosis | Bluish color to skin indicating lack of circulation |
| Albino | Genetic disorder in which melanocytes cannot produce melanin leaving skin characteristically white or void of color |
Created by:
skpoem
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