layers of skin

Question 1

thin skin

Answer 1

sweat/sebacous glands and hair follicles

Question 1

thick skin

Answer 1

only found on palms of hand and soles of feet
–> no hair follicles and increased tactile receptors

Question 2

2 main layers

Answer 2

epidermis (not vascularized)
–>stratified squamous
dermis (vascularized)
–>dense irregular connective tissue

Question 3

epidermis

Answer 3

made of keratinized stratified squamous

Question 4

5 cell types

Answer 4

keratinocytes, stem cells, melanocytes, dendritic cells, and tactile cells

Question 5

layers of epidermis (superficial to deep) in thin skin

Answer 5

stratum corneum
stratum granulosum
stratum spinosum
stratum basale

Question 6

layers of epidermis (superficial to deep) in thick skin

Answer 6

stratum corneum
stratum lucidium
stratum granulosum
stratum spinosum
stratum basale

Question 7

stratum basale

Answer 7

deepest layer above basement membrane
–> where keratinocytes are produced
–> mitosis occurs (requires nutrients from dermis

Question 8

stratum spinosum

Answer 8

prickly layer of keratinocytes and dendritic cells
–> keratinocytes begin producing keratin
–>desmosomes give spiny appearance

Question 9

stratum granulosum

Answer 9

granular layer of keratinocytes
–> process in which cells fill with keratin and flatten out
–> lamellar: slows water loss

Question 10

stratum lucidium

Answer 10

clear layer with few dead keratinocytes
–> helps with waterproofing
–> only found in thick skin

Question 10

stratum corneum

Answer 10

horny layer filled with keratinocytes

Question 11

layers of dermis

Answer 11

papillary layer (loose areolar)
reticular layer (dense irregular

Question 12

hypodermis (not apart of integumentary system)

Answer 12

made of adipose and areolar ct
function: padding, storage, insulation, and anchors skin to tissue