Anat integumentary Flashcards Preview

11th grade > Anat integumentary > Flashcards

Flashcards in Anat integumentary Deck (39):
1

epidermis

stratified squamous, no vessels.

2

dermis

thicker than epidermis
connective tissue:collagen&elastic
-smooth muscle
-nervous
-blood
-hair follicles
-glands

3

skin basal membrane

anchored to dermis by short fibrils to seperate btw 2 skin layers

4

subcutaneous layer

under dermis, loose CT and adipose binds skin to underlying
collagen and elastic run parallel to skin . no sharpe injury
has major blood vessels

5

keratinocytes

old skin cells with cell membranes thickened and developed many demosomes that sticks them to other cell

6

keratinization

cells form fibrils of keratin and harden. keratin protein made and stored inside cells

7

layers of epidermis

stratum

corneum: keratinized, dead epithelial, cells flatten/nonucleus

lucidum: clear cells

granulosum: 3-5 layers flattened granular cels, small keratin and nucei

spinosum: layers large nucei and develope keratin

basale: single row cuboidal/columnar divide and grow, melanocytes

8

skin rubbed regularly

rate of cell division increases

9

melanocytes

cells in epidermis produces melanin (dark pigment provides skin color)
cytocrine secretion

10

epidermis has ridges projecting inward

dermis has dermal papillae passing into the spaces btw

11

dermis extra

mostly irregular dense, elasticity and toughness, thicker than epi.
smooth msucle: testes, hair follicles
skeletal: face

12

lamellated (pacinian) corpuscles

stimulated by heavy pressure, sensory receproe

13

tactile (meissner's) corpuscles

light touch

14

free nerve ending

respond to temp changing and things that damage tissue

15

hair

grows, rest, fall
not on palms, soles, lip, nipple, some extern reprod

16

hair folllicle

tubelike depression, at the base a group of epidermal cells develop hair.

17

hair rooot

portion of hair embedded in the skin

18

hair papilla

end of the hair inside the skin

19

hair development

epidermal cells old pushed to surface and die, its remain is part of the hair shaft (part that is outside).

old hair is pushed outwards and droped off

20

eumelanin

brownish-black hair color

21

pheomelanin

blond and red hair

22

arrector pili muscle

smooth muscle attaches to each hair follicle, when muscle contract the short hair stands-goosebump

23

nail bed

epithelial continuos with epitheliumof the skin

24

lunula

most active growing region

Nail plate: keratinized epithelial cells, cell division push

25

sebaceous glands-holocrine

produce globules of fatty matery material that accumulate, bursting cells: result called sebum n is secreted into hair follicles

not palm and soles

26

sebum

keeps hair/skin soft, pliable, waterproof,
excess: acne

27

sweat gland-sudoriferous

ball shaped coil, in deep dermis. sweat secrets by epithelial cells

28

eccrine gland-type of sweat

respond to high body temp, forehead, neck back,
tube/ducts opens at the surface as a pore. abundant

29

apocrine gland- sweat

scent, puberty, wet certain are bc emotion, open into hair folllicles

30

ceremonious gland

secrets ear wax

31

mamary gland

milk

32

high temp

active muscle cells release heat, warm blood-brain. dermal vessel dilate, heat of blood carried outside,
deep vessle contract

33

radiation

infrared heat ray escape warm to cool, rays radiate in all directions

34

conduction

heat moves from the body directly into the molecules of cooler object in contact with its surface

35

convection

heat air move away, cold moves toward

36

evaporation

sweat evaporates, carries heat away from the body

37

genetic affect skin color

everyone has the same # of melanocytes, diffferent amt of melanin produced, controlled by genes
dark: granules: large, single

38

environmental factors affect skin color

sunlight, yv light, x-ray, darken melanin stimulate melanocyte to produced pigment

39

physiological factors affect skin color

blood adds color
oxygenated: pink
not: bluish
vessels dilate: redden
contrict: pale
carotene yelow