integumentary system Flashcards

1
Q

what is the integumentary system

A

hair, skin, nails, glands

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2
Q

function of integumentary system

A

Protective covering
Regulates body temperature
Prevents water loss
Houses sensory receptors
Forms necessary biochemicals
Excretes some waste

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3
Q

2 layers of skin

A

outer layer (epidermis)
inner layer (dermis)

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4
Q

nails

A

Protective coverings on fingers and toes.
Nail plate: keratinized cells over the nail bed
Nail bed: specialized epithelial cells
Lunula: whitish half moon that covers the most actively growing region

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5
Q

2 types of sweat glands

A

eccrine and apocrine

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6
Q

acne

A

disease of the sebaceous glands that produce blackheads and pimples

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7
Q

alopecia

A

hair loss, usually sudden

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8
Q

athletes foot

A

fungal infection usually in the skin of the toes or soles (can be anywhere on your body)

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9
Q

birthmark

A

congenital blemish on the skin usually visible right after birth

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10
Q

boil

A

bacterial infection of the skin caused by bacteria in the hair follicle

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11
Q

cyst

A

liquid-filled sac or capsule

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12
Q

dermatitis

A

inflammation of skin

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13
Q

eczema

A

non contagious skin rash that produces itching, blistering, and scaling

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14
Q

erythema

A

reddening of the skin due to dilation of dermal blood vessels in response to injury or inflammation

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15
Q

keloid

A

elevated, enlarging fibrous scar usually initiated by an injury

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16
Q

mole

A

fleshy skin tumor that is usually pigmented

17
Q

pediculosis

A

disease produced by an infestation of lice

18
Q

pruritus

A

itching of skin

19
Q

psoriasis

A

chronic skin disease characterized by red patch

20
Q

pustule

A

elevated pus-filled area on the skin

21
Q

seborrhea

A

hyperactivity of the sebaceous glands, causing greasy skin and dandruff

22
Q

ulcer

A

open sore

23
Q

urticaria

A

allergic reaction of the skin that produces redding, elevated patches

24
Q

melanocytes

A

produce the dark pigment melanin which absorbs UV light (skin color)

25
Q

deepest layer of the epidermis

A

stratum basale

26
Q

stratum corneum

A

layer of hard dead cells

27
Q

keratinization

A

get hard due to the cytoplasm filling with the protein keratin

28
Q

sebaceous gland

A

Secrete an oily mixture of fatty material and debris (sebum)
Sebum keeps the hair and skin soft, flexible, and waterproof