Integumentary System Flashcards

1
Q

What 3 things make-up the integumentary system?

A

integument, hypodermis, appendages

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2
Q

What is the largest organ of the body?

A

skin

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3
Q

What are the two layers of skin?

A

epidermis, dermis

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4
Q

What type of epithelia is the epidermis?

A

stratified squamous

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5
Q

What type of connective tissue is the dermis?

A

Dense irregular connective tissue

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6
Q

The epidermis is made of what?

A

epithelium

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7
Q

The dermis is made of what?

A

connective tissue

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8
Q

The hypodermis is made of what?

A

subcutaneous tissue (loose connective tissue proper)

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9
Q

What are the six functions of the skin?

A

protection, temp regulation, water retention, excretion, production of vitamin D, and sensory reception

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10
Q

In what 3 ways does skin protect your body?

A

immune defense, UV radiation, contact wear

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11
Q

What two mechanisms aide in temperature regulation?

A

capillaries and sweat glands

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12
Q

What does skin excrete through sweat?

A

urea, salts, and water

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13
Q

What is the name of the specialized squamous cells of the skin?

A

keratinocytes

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14
Q

What protein do keratinocytes produce?

A

keratin

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15
Q

What does keratin do for the protection of skin?

A

prevent mechanical wear, produces antibiotics

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16
Q

What layer of the epidermis is the most active and is constantly undergoing mitosis?

A

basal layer

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17
Q

As cells reach the apical surface, they ______ and are filled with _____

A

die, keratin

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18
Q

What happens to keratinized cells when they encounter friction?

A

they are rubbed off

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19
Q

How many layers are in thick skin?

A

5

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20
Q

Where is thick skin found?

A

soles of feet and palms of hands

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21
Q

How many layers are in thin skin?

A

4

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22
Q

Where is thin skin found?

A

everywhere over the body

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23
Q

What is the most basal layer of skin?

A

stratum basale

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24
Q

What is stratum basale composed of?

A

a single row of cuboidal stem cells

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25
Q

What are the 3 types of cells in the stratum basale?

A

keratinocytes, tactile, and melanocytes

26
Q

What do melanocytes produce?

A

melanin

27
Q

Melanocytes are absorbed by what type of cells?

A

keratinocytes

28
Q

All skin has the same amount of _____ but do not all produce the same amount of _____

A

melanocytes, melanin

29
Q

UV rays strip away what type of acid?

A

folic

30
Q

Lighter skin evolved away from the equator to promote what?

A

vitamin D synthesis

31
Q

What is the most apical layer of the epithelia?

A

stratum corneum

32
Q

Cells are shed how often?

A

continuously

33
Q

What are fingernails composed of?

A

dead keratinized cells

34
Q

What is hair made of?

A

long, hard, keratinized filaments

35
Q

What are the two types of hair?

A

vellus and terminal

36
Q

Where is vellus hair found?

A

all over the body

37
Q

Where is terminal hair found?

A

scalp, armpits, pubic region

38
Q

What is the main function of vellus hair?

A

touch reception (some protection)

39
Q

What is the role of the dermis?

A

To supply blood to the epidermis

40
Q

The dermis resists _____ in all directions

A

tension

41
Q

What layer of skin is vascular and innervated?

A

dermis

42
Q

What are the two layers of the dermis?

A

papillary, reticular

43
Q

What part of the dermis is why all fingerprints are unique?

A

papillary

44
Q

The ____ projects into the epidermis

A

papillary dermis

45
Q

What is the role of papillary dermis?

A

to increase surface area of the dermis and epidermis

46
Q

What is the reticular dermis composed of?

A

collagen and elastic fibers

47
Q

The reticular dermis has a rich supply of ___ and _____

A

nerves and vessels

48
Q

The reticular dermis regulates what?

A

temperature

49
Q

Eccrine glands are found where?

A

everywhere (palms, soles, forehead,etc)

50
Q

Eccrine glands help with what function?

A

temperature regulation

51
Q

Apocrine glands are found where?

A

armpit, anal, and genital areas

52
Q

Apocrine glands are ___ that open into _____

A

ducts, hair follicles

53
Q

Bacteria feast on the ______ of the apocrine glands and cause body odor

A

secretions

54
Q

When do apocrine glands start functioning?

A

at puberty

55
Q

what are the two types of specialized apocrine glands?

A

ceruminous and mammary

56
Q

What do ceruminous glands produce?

A

wax in the ear canal

57
Q

What do mammary glands produce?

A

milk

58
Q

What is produced by the holocrine glands?

A

sebum (oil)

59
Q

What are the 3 functions of the holocrine (oil) glands?

A

lubrication of skin and hair, collecting dirt/killing bacteria, slow water loss

60
Q

What is the subcutaneous tissue composed of?

A

loose areolar connective tissue and adipose connective tissue

61
Q

The subcutaneous layer is the site of what type of injections?

A

hypodermal

62
Q

Another word for the subcutaneous tissue is what?

A

hypodermis, superficial fascia