Histology: Skin Flashcards Preview

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Flashcards in Histology: Skin Deck (22):
1

What are the layers of the skin?

- Epidermis
- Dermis
- Subcutis

2

What color does the epidermis stain?

Blue

3

What color does the dermis stain?

Mostly pink due to the collagen

4

What makes up the epidermis?

Mostly keratinocytes which makes up the most superficial layer of skin

5

What are the layers of the epidermis?

- Stratum Corneum
- Stratum Lucidum
- Stratum Granulosum
- Stratum Spinosum
- Stratum Basale

6

Where is the only place the stratum lucidumis found?

Acral areas - thick skin like on the hands and the soles of the feet

7

What is found in the stratum granulosum?

Cells contain keratinohyaline granules that stain purple

8

Where do SCCs arise from?

Stratum Spinosum

9

Where do BCCs arise from?

Stratum Basale

10

Where is thin skin found?

Everywhere in the body except acral areas

11

Where is thick skin found?

Hands and soles of feet

12

How long does it take for cells to go from the basal layer to the corneal layer?

25 days - this will be decreased in inflammatory conditions

13

What connects keratinocytes to each other?

Desmosomes

14

What connects keratinocytes to the basement membrane?

Hemidesmosomes

15

What is the function of melanocytes?

Produce melanin which is used by the keratinocytes over their nuclei to shield from UV damage

16

What are the benign neoplasms of melanocytes?

Nevi

17

Dermis

Everything below the dermal epidermal junction and contains connective tissue - mostly type I collagen

18

What are the 2 layers of the dermis?

- Papillary
- Reticular

19

Papillary Dermis

Capillaries and Meissner's corpuscles can be found within it

20

What are major types of fibers that the dermis is comprised of?

- Collagen Type I
- Elastic Fibers

21

Holocrine Secretion

Entire cell collapses to form the secretion

22

Subcutis

Deep to the dermis and is made of loose connective tissue that contains adipose tissue, nerves, sensory receptors, arteries and veins.

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