Lecture 10 - Integument part II Flashcards Preview

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Flashcards in Lecture 10 - Integument part II Deck (53):
1

What is dermis?

CT layer deep to epidermis

2

What lays inbetween the s. basale and the dermis?

Basement membrane

3

What is the function of the dermis?

Nourishes epidermis, highly vascularized

4

What are langer lines the purpose?

determines tension and wrinkles in skin lines

5

What are langer lines made of?

Pattern distribution of Type I collagen fibers

6

Why is it important to know where langer lines are?

determines pace and nature of wound healing

7

What are the layers of the dermis?

Papillary and reticular

8

What is the papillary layer made up of?

loose connective tissue

9

How does it interact with the epidermis?

Interdigitates with epi. still seperated by basement membrane

10

What are the interdigitations between the epidermis and dermis called?

Rete apparatus

11

What fibers are with in the papillary layer?

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

12

Where are the anchoring fibers originating from?

Basal lamina

13

What is the reticular layer made from?

Dense irregular connective tissue

14

What fiber types are with in the reticular layer?

Type I collagen fiber and thick elastic fibers

15

What other cell types are with in the reticular layer?

smooth muscle cells

16

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

arrector pilli

17

What other structures reside within the reticular layer?

Epidermally derived glands and hair follicles

18

What is a first degree burn?

just epidermis destroyed

19

What is a second degree burn?

Epidermis + dermis are destroyed (blistering)

20

What is a third degree burn?

Epidermis + dermis + hypodermis

21

What are considered appendages of the skin?

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

22

What is hair made of?

elongated keratinized structures derived from invaginations of epidermal epithelium

23

What causes shedding?

An increased turn over rate of hair

24

What is a claw composed of?

Plate of keratinized epithelial cells

25

What do sebaceous glands produce?

sebum, waxy texture

26

Where are there no sebaceous glands?

Palms, soles, and sides of feet

27

Where are sebaceous glands located?

within fibrous sheath surrounding each hair folicle

28

Why might sebaceous glands be around hair follicles?

aid in hair flexability and proper skin texture

29

What else is grouped with sebaceous glands and hair follicles?

arrector pilli muscles

30

What is sebum made up of?

cholesterol, triglycerides, anf cell debris

31

What method of secretion do sebaceous glands use?

Holocrine

32

What happens with holocrine secretion?

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

33

What is the acinus?

Basal layer of undifferentiated flattened epithelial cells resting on basal lamina

34

What do acinus cells have with in them?

Alot of lipid filled vacuoles

35

What are the two types of sweat glands?

Eccrine and apocrine

36

What is eccrine secretions used for?

temp regulation

37

What are apocrine secretions used for?

other uses (ie. temp regulation, sex glands)

38

What kind of gland structure is the eccrine gland?

simple coiled tubular glands

39

Where are eccrine glands located on dogs?

Tongue and foot pads

40

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

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

41

What kind of secretion does eccrine do?

merocrine secretion

42

What is merocrine secretion?

excocytosis, cells are not damages during secretion

43

What is cytocrine secretion?

Cell not damaged but part of it gone

44

What do eccrine glands have to help move along secretions?

myepithelial cells

45

Where do apocrine glands come from?

Epithelium of hair folicle

46

What layer is the apocrine gland located in?

Dermis and hypodermis

47

Where are there always apocrine glands?

axilla, areola, and anal regions

48

What do dogs and cats use them for primarily?

thermoregulation

49

Where do apocrine glands open up?

just superficial to entry of the sebaceous gland

50

What do apocrine secretions contain?

pheromones

51

What is special about axillary apocrine glands?

secrete milky product, odorless until metabolized by bacteria

52

Which sweat gland is larger?

Apocrine gland

53

Where is the secretory product of apocrine glands stored?

lumen