Integumentary System Flashcards

1
Q

Eccrine Sweat Glands

A
  • simple, coiled, tubular gland
  • abundant on palms, foreheads, soles of feet
  • connect to pores
  • NOT SMELLY (99% water)
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2
Q

Follicle

A
  • tube-like pocket in skin and scalp
  • contains the hair root
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3
Q

Medulla

A
  • inner most layer of hair
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4
Q

Hair bulb

A
  • fat end of hair
  • the lowest part of the hair root
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5
Q

Hyponychium

A

the skin between the free edge and fingertip

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6
Q

Functions of Integumentary System

A

Protection, sensation, excretion, temperature regulation, vitamin D production

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7
Q

Parts of System

A

Nails, Skin, Hair, Glands

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8
Q

Keratinocytes

A
  • most abundant epidermal cells
  • produce keratin (protects skin)
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9
Q

Melanocytes

A
  • cells that produce melanin (skin pigment)
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10
Q

Langerhans cells

A
  • epidermal macrophages that activate the immune system
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11
Q

Merkel cells

A
  • light touch receptors
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12
Q

Eumelanin

A
  • brownish-black pigment

mnemonic:
EW-melanin

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13
Q

Melanin

A
  • pigment of skin
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14
Q

Pheomelanin

A
  • reddish-yellow pigment

mnemonic:
THEOmelanin (ginger-red)

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15
Q

Keratin

A
  • hard protein in epidermis, hair, and nails
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16
Q

Stratum Corneum

A
  • outer layer of epidermis
  • consists of flattened keratinocytes
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17
Q

Stratum Lucidum

A
  • translucent
  • found in soles of feet and palms (thick skin only)

mnemonic:
transLUCent
LUCidum

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18
Q

Stratum Granulosum

A
  • thick layer
  • transition between active cells and dead cells
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19
Q

Stratum Spinosum

A
  • gives flexibility and strength to the skin
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20
Q

Stratum Basale

A
  • rapid cell division occurs here

mnemonic:
BASE-ale (bottom)

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21
Q

Epidermis

A

Outermost layer of skin
- avascular

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22
Q

Dermis

A

Thickest (middle) layer of skin
- vascular
- where tattoos are put in
- papillary layer that makes thumb prints

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23
Q

Hypodermis

A
  • subcutaneous layer
  • vascular
  • made up of adipose and areolar tissue
  • connects skin to muscle
  • elastic
  • atrophies with age
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24
Q

Meissner’s corpuscles

A
  • light touch receptors (in some parts)
25
Q

Functions of the dermis

A

contains sensory receptors, stabilizes provides blood supply to the epidermis

26
Q

free nerve endings (nociceptors)

A
  • respond to pain and extreme temperatures
27
Q

CIPA

A

Congenital Insensitivity to Pain with Anhidrosis

28
Q

Krause end bulbs

A

thermoreceptor for cold temperature

mnemonic:
Santa KRAUS (cold)

29
Q

Pacinian corpuscles

A

deep pressure and vibration receptors

mnemonic:
Pacinian
Pressure

30
Q

Ruffini endings

A

respond to stretch

31
Q

Merkel cells (disks)

A

nerve fibers close to the epidermis that sense touch and pressure

32
Q

apocrine sweat glands

A

produce smelly sweat in the darker places of the body

33
Q

basis of skin color

A

result of the interaction between epidermal pigmentation and dermal circulation

34
Q

Carotenemia

A

condition where excess beta-carotene turns the skin yellow

35
Q

Signs of Melanoma

A

A symmetry
B order irregularity
C olor change
D iameter change of moles

36
Q

Arrector Pili Muscle

A

involuntary muscle fiber
- cause goosebumps

37
Q

functions of hair

A

protects, insulates, sensitive to light touch

38
Q

hair shaft

A

portion of hair above the surface

39
Q

hair root

A

portion of hair below the surface

40
Q

hair papilla

A

dermal tissue that is connected to capillaries that supply nutrients to the hair root

41
Q

Anagen phase of hair growth

A

active growth that can last 2-7 years

mnemonic:
A nagen
A ctive

42
Q

Catagen phase of hair growth

A

hair stops growing and dies. easy to pull out

mnemonic:
Cats, death, gross

43
Q

Telogen phase of hair growth

A

hair reaches maximum length and reaches resting phase

mnemonic:
Do the chickens have large talons?
TALogeN (long hair)

44
Q

Vellus hair

A

peach fuzz

45
Q

terminal hair

A

All other hair

46
Q

hair texture

A

determined by follicle shape

47
Q

cortex of hair

A

middle layer that holds color

48
Q

cuticle of hair

A

outer layer of hair made of keratinized cells covering the cortex

49
Q

functions of nails

A

scratching, grasping, and protection

50
Q

nail plate

A

translucent portion of the nail

51
Q

free edge

A

part of the nail that extends over the tip of the finger

52
Q

nail root

A

anchors nail into finger

53
Q

lunula of nail

A

white area at the base of the nail (thickened stratum basale)

54
Q

cuticle

A

loose and pliable overlapping skin around the nail

55
Q

nail bed

A

living skin under the nail plate

56
Q

matrix bed

A

where nail plate cells grow

57
Q

nail folds

A

side edges of the nail

58
Q

mantle of nail

A

contains root and matrix of the nail