Dermis

Question 1

Other names for the dermis

Answer 1

true skin, cutis

Question 2

2 layers of the dermis

Answer 2

papillary and reticular layer

Question 3

what is contained in the papillary layer (aka dermal papillae)?

Answer 3

• looped capillaries-arteries and veins

- tactile corpuscles-nerve endings

Question 4

what are the structures found with in the reticular layer?

Answer 4

• fat cells -sudoriferous glands
• blood vessels -hair follicles
• lynph vessels -arrector pili muscle
• sebaceous glands -nerve endings

Question 5

fat cells

Answer 5

used for insulation and energy reserve

Question 6

blood vessels

Answer 6

transports blood wich carries oxygen and nutrients to the cells and removes waste products

Question 7

lymph vessels

Answer 7

filters and removes waste from the extra interstitial fluid

Question 8

sebaceous gland

Answer 8

produces sebum which lubricates the surface of the skin

Question 9

sudoriferous gland

Answer 9

excretes wastes and toxings through perspiration

Question 10

hair follicle

Answer 10

protects against the elements, helps with regulation of body temp, and aids in the transportation of sebum onto the skin

Question 11

arrector pili muscle

Answer 11

causes goose bumps to help regulate body temp

Question 12

nerve ending

Answer 12

used for the detection of different sensations

Question 13

subcutaneous (hypodermis)

Answer 13

• made up of adipose tissue
• regulates body temp
• cushions and protects internal organs and bones
• stores excess energy
• provides shape and contour
• stores fat soluble vit. A,D, E and F

Question 14

what are the proteins of the dermis?

Answer 14

collagen, elastin and reticulan

Question 15

collagen

Answer 15

• makes up 70% of the dermis
• gives us Tone
• aids in wound healing
• produced by fibroblast

Question 16

elastin

Answer 16

-makes up 15% of the dermis
-gives us Elasticity
-when elastin is damaged it is replaced with collagen,
this creates a scar (cicatrix)

Question 17

reticulan

Answer 17

• makes up 5% of the dermis

- creates a support system for the other structures in the dermis

Question 18

ground substance

Answer 18

made up of

• proteins
• glycosaminoglycans

Question 19

glycosaminoglycans

Answer 19

• gel like substance made up of water and protein
• maintans water balance and gives support to the dermis
• contains Hyaluronic Acid (can hold 100x its own weight in water)

Question 20

what are the specialized cells of the dermis?

Answer 20

• mast cell -lymphocyte

- macrophage -fibroblast

Question 21

mast cell

Answer 21

• responsible for the inflammatory response

- produces 2 chemicals: histamine and heparin

Question 22

histamine

Answer 22

causes edema and pruritis

Question 23

edema

Answer 23

swelling

Question 24

pruritis

Answer 24

itching

Question 25

heparin

Answer 25

causes erythema and heat

Question 26

erythema

Answer 26

redness

Question 27

lymphocyte

Answer 27

produces antibodies (WBC)

Question 28

macrophage

Answer 28

engulfs antigens (WBC/large phagocyte)

Question 29

fibroblast

Answer 29

• cell produces collagen

- vitamin C stimulates fibroblast cells to produce more collagen