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histology > integument part 1 > Flashcards

integument part 1 Flashcards

1
Q

Three layers of skin

A

-epidermis, dermis and hypodermis

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2
Q

epidermis

A

outer layer
-keratinized stratified squamous
-protection
-basal layer folded to form dermal papillae
-think skin has 4 layers thick has 5

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3
Q

dermis

A

-thicker
-connective tissue layer
-sensation, protection, thermoregulation
-has nerves and blood supply and fibroblasts and sweat glands
-apical layer of deris are folded to form dermal papillae (more prominant in thick skin)
-densse irreuglar c.t.

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4
Q

hypodermis

A

mainly adipose and sweat glands
-adipose responsible for producing vitamin d and triglycerides

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5
Q

eye lid

A

.5mm thick

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6
Q

heels of feet

A

4.0mm thick

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7
Q

how many layers of ectoermal tissue does the skin have

A

up to 7

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8
Q

cuando esa puerta suene y te de una paranda ni de mi te acuerdes

A
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9
Q

skin also?

A

protects vitamin B folates

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10
Q

integumentary system

A

-skin
-hair
-nails
-sweat glands
-oil glands
-mammary gland

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11
Q

cutaneous membrane

A

epidermis and dermis
-dermis has hypodermis

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12
Q

accessory strucutres

A

-hair follicles
-exocrine glands
-nails

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13
Q

integumentary functions

A

-physical protection
-excretion of products
-synthesis of product
-sensation
-immune defense

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14
Q

thick skin

A

-palms and soles
-made of five skin layers

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15
Q

think skin

A

-rest of the body
-four layers

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16
Q

four epidermis cell types

A

-keratinocytes
-malanocytes
-merkel cells
-langerhans

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17
Q

keratinocytes

A

produce tough protein= keratin

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18
Q

melanocytes

A

pigment cells deep in the dermis
-produce melanin

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19
Q

merkel cells

A

sensory cells

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20
Q

langerhans

A

fixed macrophages

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21
Q

layers of epidermic

A

come lets get some booze
(superficial to deep)

22
Q

basal layer

A

-where melanocytes are
-cells here do active reproduction

23
Q

spinosum

A

-keratinocytes bound together by desmosomes

24
Q

granulosum

A

keratinocytes produce keratin

25
Q

corneum

A

superficial layer
-interlocking dehydrated dead cells

26
Q

epidermal ridges

A

-formed by stratum germinativum
-they are dermal papillae that extend into dermis
-fingerprints

27
Q

skin color is caused by?

A

-dermal blood supply
-thickness of stratum corneum
-concentrations of carotene and melanin

28
Q

two layers of the dermis

A

-papillary layer
-reticular layer

29
Q

papillary layer

A

superficial dermis

30
Q

reticular layer

A

deep dermis

31
Q

papillary layer has?

A

-dermal papillae
-capillaries
-nerve axons

32
Q

reticular layer has?

A

-dense irregular connective tissu e
-hair follicles
-sweat glands
-sebaceous glands

33
Q

subcutaneous layer

A

also called the hypodermis
-not part of the integumentary system just stabilizes it

34
Q

what is in the hypodermis

A

-adipose tissue
-major blood vessels

35
Q

hair

A

made of keratin

36
Q

hair follicles

A

cells are in concentric rings

37
Q

hair types

A

-vellus, intermediate and terminal

38
Q

vellus hair

A

covers most of the body

39
Q

intermediate hair

A

covers arms and legs

40
Q

terminal hair

A

covers head

41
Q

hair functions

A

-protect from uv light
-indulation
-guards nose and ear entrances
-arrector pili muscle contractions= goosebumps
-sensation impulse to brain (bug on arm)

42
Q

hair color

A

varies bc of melaning by melanocytes
-decreases with age

43
Q

glands in the skin

A

sebaceou snad sweat
-they lubricate the epidermis and excrete waste and help w thermoregulation

44
Q

sweat gland

A

-apocrine
-ceruminous
-mammary
-merocrine

45
Q

ceruminous and mammary glands are

A

type of apocrine glands

46
Q

sebaceous glands function

A

-secrete sebum to lubricate skin
-everywhere but palms and soles
-lots on forehead, face and upper back
-blocked duct= acne

47
Q

apocrine glands

A

-sweat glands
-armpits and nipples
-pheromones to attract fetus in men and women

48
Q

merocrine

A

-sweat glands
-also called eccrine glands
-all over the body
-lots on palms and soles
-sweat to cool down

49
Q

mammary glands

A

produce milk when hormones come from pituitary gland

50
Q

ceruminous gland

A

-type of apocrine gland
-only in the ear canal
-makes cerumen/ ear wax

51
Q

nail structures

A

-free edge
-lateral nail fold
-lanula
-eponychium
-hyponychium

52
Q

aging

A

-epidermis and dermis thinner
-less vitamin d made
-less malanocyte activity
-less glandular activity
-hair follicles stop functioning

histology (20 decks)

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