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Term
Definition
The Integumetary System Includes   glands, hair, nails, skin  
Skin   classified as an organ  
Functions of the Skin   protects the body from injury, prevents internal body cells from drying out, maintains body temperature  
Layers of the Skin   epidermis, dermis  
Epidermis Includes   keratin, stratum germinativum, stratum corneum, melanin  
Epidermis   the outermost layer; contains keratin; non-vascular layer  
Keratin   protein that is tough, waterproof; fill skin cells  
Layers of the Epidermis   stratum germinativum, stratum corneum  
Stratum Germinativum   layer of the epidermis that is the only one capable of producing new cells  
Stratum Corneum   outer epidermis that flakes off as the skin renews itself  
Melanin   pigment that gives skin its color; dark-skinned people will have more pigment; cells that are active and produce more melanin (freckles- irregular patches of melanin  
Dermis   AKA corium; true skin; innermost layer; has blood vessels, nerves, and glands  
Layer of the Dermis   subcutaneous layer  
Subcutaneous Layer   has a generous supply of adipose tissue  
Skin   classified as an organ; enveloping membrane; AKA integumentary system; does not breathe; heat is lost from the skin by evaporation  
Skin Contains Kinds of Tissue   nerve, connective, epithelial  
Skin Properties   pH slightly acidic, prevents growth of pathogens; contains compound converted to VitD (sunshine) when exposed-uv rays of the sun (ca assists absorption of Vit D); people who sunbathe more prone to wrinkles, skin cancers, dry skin & sunburn  
Sweat Glands   regulate heat, odor, & sweat; called suderiferous glands; main function-regulate body temp.; when functioning, we perspire from pores; ceruminous  
Pores   openings of the sweat glands  
Ceruminous Gland   modified sweat gland; produce cerumen (ear wax) that protects the ear drum  
Sebaceous Glands   sac-like structure that secretes sebum; secrete substances into a hair follicle; main function is to lubricate skin  
Sebum   very oily substance  
Hair   covers most of the body (not palms of hands or soles of feet); consists of dead cells and keratin; will grow as long as the follicle is not destroyed  
Nails   originate in the outer layer of the epidermis; affected by general health; grow from the proximal end called the root  


   


 

 

 

 

 

 
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