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a_anatomy > Lecture 10 - Integument part II > Flashcards

Lecture 10 - Integument part II Flashcards

1
Q

What is dermis?

A

CT layer deep to epidermis

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2
Q

What lays inbetween the s. basale and the dermis?

A

Basement membrane

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3
Q

What is the function of the dermis?

A

Nourishes epidermis, highly vascularized

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4
Q

What are langer lines the purpose?

A

determines tension and wrinkles in skin lines

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5
Q

What are langer lines made of?

A

Pattern distribution of Type I collagen fibers

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6
Q

Why is it important to know where langer lines are?

A

determines pace and nature of wound healing

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7
Q

What are the layers of the dermis?

A

Papillary and reticular

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8
Q

What is the papillary layer made up of?

A

loose connective tissue

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9
Q

How does it interact with the epidermis?

A

Interdigitates with epi. still seperated by basement membrane

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10
Q

What are the interdigitations between the epidermis and dermis called?

A

Rete apparatus

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11
Q

What fibers are with in the papillary layer?

A

Collagen fibers (I and III), elastic fibers, and anchoring fibers

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12
Q

Where are the anchoring fibers originating from?

A

Basal lamina

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13
Q

What is the reticular layer made from?

A

Dense irregular connective tissue

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14
Q

What fiber types are with in the reticular layer?

A

Type I collagen fiber and thick elastic fibers

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15
Q

What other cell types are with in the reticular layer?

A

smooth muscle cells

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16
Q

What is the purpose of smooth muscle cells with in the reticular layer?

A

arrector pilli

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17
Q

What other structures reside within the reticular layer?

A

Epidermally derived glands and hair follicles

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18
Q

What is a first degree burn?

A

just epidermis destroyed

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19
Q

What is a second degree burn?

A

Epidermis + dermis are destroyed (blistering)

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20
Q

What is a third degree burn?

A

Epidermis + dermis + hypodermis

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21
Q

What are considered appendages of the skin?

A

Claws, nails, hair, sweat glands, and sebaceous glands

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22
Q

What is hair made of?

A

elongated keratinized structures derived from invaginations of epidermal epithelium

23
Q

What causes shedding?

A

An increased turn over rate of hair

24
Q

What is a claw composed of?

A

Plate of keratinized epithelial cells

25
Q

What do sebaceous glands produce?

A

sebum, waxy texture

26
Q

Where are there no sebaceous glands?

A

Palms, soles, and sides of feet

27
Q

Where are sebaceous glands located?

A

within fibrous sheath surrounding each hair folicle

28
Q

Why might sebaceous glands be around hair follicles?

A

aid in hair flexability and proper skin texture

29
Q

What else is grouped with sebaceous glands and hair follicles?

A

arrector pilli muscles

30
Q

What is sebum made up of?

A

cholesterol, triglycerides, anf cell debris

31
Q

What method of secretion do sebaceous glands use?

A

Holocrine

32
Q

What happens with holocrine secretion?

A

as secretory cell matures, it dies and becomes part of secretory product

33
Q

What is the acinus?

A

Basal layer of undifferentiated flattened epithelial cells resting on basal lamina

34
Q

What do acinus cells have with in them?

A

Alot of lipid filled vacuoles

35
Q

What are the two types of sweat glands?

A

Eccrine and apocrine

36
Q

What is eccrine secretions used for?

A

temp regulation

37
Q

What are apocrine secretions used for?

A

other uses (ie. temp regulation, sex glands)

38
Q

What kind of gland structure is the eccrine gland?

A

simple coiled tubular glands

39
Q

Where are eccrine glands located on dogs?

A

Tongue and foot pads

40
Q

Where do these ducts open? What are they associated with?

A

On skin surface, out of sweat pores. Associated with nothing

41
Q

What kind of secretion does eccrine do?

A

merocrine secretion

42
Q

What is merocrine secretion?

A

excocytosis, cells are not damages during secretion

43
Q

What is cytocrine secretion?

A

Cell not damaged but part of it gone

44
Q

What do eccrine glands have to help move along secretions?

A

myepithelial cells

45
Q

Where do apocrine glands come from?

A

Epithelium of hair folicle

46
Q

What layer is the apocrine gland located in?

A

Dermis and hypodermis

47
Q

Where are there always apocrine glands?

A

axilla, areola, and anal regions

48
Q

What do dogs and cats use them for primarily?

A

thermoregulation

49
Q

Where do apocrine glands open up?

A

just superficial to entry of the sebaceous gland

50
Q

What do apocrine secretions contain?

A

pheromones

51
Q

What is special about axillary apocrine glands?

A

secrete milky product, odorless until metabolized by bacteria

52
Q

Which sweat gland is larger?

A

Apocrine gland

53
Q

Where is the secretory product of apocrine glands stored?

A

lumen

a_anatomy (43 decks)

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