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16 Cards in this Set
- Front
- Back
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functions of the integumentary system: skin, hair, nails, glands
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protection
temperature regulation sensory(touch) absorption, secretion & excretion vitamin d production |
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skin
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largest and heaviest organ of the body and can weigh up to 9lbs of body weight.
- replaced every 19-36 days |
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epidermis
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outermost layer of the skin
-no nerves -cells are crowed close together |
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dermis
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middle layer of skin;true skin
-thicker than epidermis -cells are less crowed together -has collagen and elastin |
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subcutaneous(hypodermis)
superficial fascia |
loose connective tissue and adipose tissue
-above muscle and bone - insulates the body from extremes of hot/cold - stores energy |
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hair: located everywhere except palms and digits
soles and digits lips genitals nipples |
protects the skin and openings to the body
- keeps us warm -assists with the sense of touch |
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dermatomes
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section of skin that is supplied by a single spinal nerve
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arrector pilli
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muscles of the hair
-attaches to hair follicle |
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sebaceous glands:
connected to hair follicles by small ducts located everywhere except for palms and soles |
oil glands;secretes sebum
-prevent dehydration -soften the skin and hair -slow the growth of bacteria - |
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sudoriferous glands:
sweat glands that produce a white,thick protein with water and waste |
located everywhere with highest concentration on foreheads, palms and soles.
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melanin(melanocytes)
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brown pigment
-epidermis -makes up most of skin color |
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carotene
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yellow pigment in the dermis
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hemoglobin
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oxygen carrying molecule in the blood
-red in color |
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vellus
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peach fuzz
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nails
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hard keratinized cells of epidermis
- protect the end of digitss -assists us in grasping |
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lanula
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crescent white area;site of cell growth
-covered by connective tissue |
