HISTOLOGY - Integument

Question 1

Answer 1

Epidermis - keratinized stratified squamous

Dermis - dense irregular CT

Question 2

Answer 2

Epidermis w/ 5 Layers

Question 3

Answer 3

Stratum spinosum

note the spikes arund each cell edge (i.e spines = spinous)

Question 4

Answer 4

Thick skin (left) and thin skin (right)

Note the layer of the statum lucidum superficial to the dark stratum granulosum

Question 5

Question 6

Answer 6

Keratinocytes

Question 7

What are the arrows pointing to?

Answer 7

Stratum basale

Question 8

Answer 8

stratum spinosum

note the spikes arund each cell edge (i.e spines = spinous) – tonofibrils

Question 9

Answer 9

stratums granulosum — has lamellar granules that are v dark

Question 10

What Is the arrow outlining?

Answer 10

stratum corneum – most superficial layer

Question 11

What are the boxes showing?

Answer 11

Question 12

What does DP stand for and identify?

Answer 12

Dermal papillae

Question 13

What are PL and RL

Answer 13

Papillar Layer

Reticular Layer

Question 14

What does the arrow define?

Answer 14

Hypodermis – subcutaneous fascia – i.e. FAT and loose CT

Question 15

Answer 15

Merkel Cells

Question 16

What are the purple, stringly things?

Answer 16

Free Nerve Endings

Question 17

Answer 17

Meissner’s Corpuscles

Question 18

What is the circular object

Answer 18

Lamellar (Pacinian) Corpuscle

Question 19

Answer 19

Subaceous glands

Question 20

Answer 20

exocrine sweat glands

Question 21

Answer 21

apocrine sweat glands

*note how “hole-y” they are

Question 22

What is APM showing?

Answer 22

Arrector pili muscle

Question 23

What are the blocked-out structures?

Answer 23

Nail Root

Nail Matrix

Epichonium

Nail