Week 3 Skin Flashcards

1
Q

Starting from most superficial to deep list the following in order: muscle, hypodermis/superficial fascia/SQ, dermis, epidermis, deep fascia

A

epidermis–>dermis–>hypodermis–>deep fascia–>muscle

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2
Q

define tissue

A

group of cells with a common fxn

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3
Q

define histology:

A

study of microscopic anatomy. includes cellular level, tissue level and organ level

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4
Q

what is the role (2) of connective tissue?

A

protections and support

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5
Q

acidic dyes bind with what ion?

A

acidic dies carry a negative charge and bind to cationic cell/tissue components

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6
Q

what are some things inside the cell that will bind with acidic dies?

A

what has a positive charge? mitochondria, secretory granules, cytoplasm, basement membrane

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7
Q

basic dies will bind what?

A

carry a net positive charge and will therefore bind anionic cell/tissue components

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8
Q

what is the most common acid dye?

A

eosin

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9
Q

what sort of things will basic dyes bind?

A

DNA, RNA, carboxyl groups of proteins, sulfate, cartilage matrix

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10
Q

what is the most common basic dye?

A

hematoxylin

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11
Q

what is an H&E stain?

A

hematoxylin and eosin stain that gives the best overall picture of microscopic structures

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12
Q

what is the integument composed of? 2

A

skin and accessory structures

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13
Q

the accessory structures of the integument include: (4

A

sebacous glands, sudoriferous glands, hair, nails

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14
Q

how are glands and follicles of the integument formed?

A

down growths of epidermis

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15
Q

what are the major functions of the integument? (5)

A

protection, sensation, temp reg, metabolic, waste elimination

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16
Q

what are the two layers of the skin

A

epidermis and dermis

17
Q

contrast the epidermis from the dermis. location, make-up, derived from what

A

epidermis: superficial, keratinized saquamous epithelium, ectoderm derived dermis: deep, connective tissue, mesoderm derived

18
Q

describe the vasularity and innervation of epithelium

A

avascular but innervated (rely on underlying connective tissue to supply nutrients)

19
Q

what would a histologist classify as thick skin?

A

they look at the thickness of the epidermis. thick skin is only seen at palms and souls of feet (no hair follicles here)

20
Q

what would a gross anatomist classify as thick skin?

A

they look at the epidermis and dermis. thickest skin is the upper back

21
Q

what is connective tissue?

A

cells in an extracellular matrix

22
Q

all connective tissues are derived from what stem cell?

A

mesenchymal

23
Q

describe the vasularity of connnective tissue

A

varies in vascularity: avascualr=cartilage vascular=bone

24
Q

what makes up (2) the ECM

A

protein fibers and ground substance

25
Q

what protein fibers are seen in the ECM?

A

collagen, reticular, elastic

26
Q

what is seen in ground substance?

A

glycoaminoglycans, proteoglycans, multiadhesive glycoproteins

27
Q

what are the five types of connective tissue proper?

A

loose, reticular, dense regular, dense irregular, adipose

28
Q

what are the two types of specialized connective tissue?

A

blood, supporting connective tissue (cartilage and bone)

29
Q

what are the layers of the dermis 2

A

papillary layer: superficial; areolar connective tissue reticular layer: deep; dense irregular connective tissue with more collagen

30
Q

what is the superficial fascia primarily composed of?

A

AKA hypodermis. white adipose tissue and loose connective tissue

31
Q

what is the deep fascia primarily composed of

A

dense irregular connective tissue

32
Q

what are these layers

A

top: slanted arrow is nothing

epidermis and dermis

hypodermis

deep fascia

muscle

33
Q

what are these layers?

A
  1. papilary layer
  2. reticular layer

(epidermis included both the regions above the papillary layer, keratinized surface and lower stratified squamous eptihelaial layer

34
Q

what is these

A
  1. dermis
  2. hypodermis
  3. epidermis
  4. white adipose in hypodermis