Integumentary system

STUDY THE MOST

How many square inches is the hair follicle?

65

nerve count (square inches)

1000

sebaceous gland (sq inch count)

95-100

how much ft is blood vessles

20 ft

sweat gland count

650

cell count

19ML

what are the 3 things that consist of protein and composition?

Keratin, collagen, and elastin

what factors describe healthy skin?

slightly moist, soft and smooth, runs acidic, has turnover rate of 28 days

what are the acidic numbers?

4,5,6,2

Keratin

protein fiber that provides resilience and structure found in all epidermal layers

stratum corneum

25-30 layers of cells thick, the horny layer

Stratum Lucidum (translucent layer)

lies between the stratum corneum and the stratum grenulosum. found in soles of feet and palms of hands.

stratum granulosum

3-5 layers thick, filled with keratin, undergoing structure change

stratum spinosum

spiny layer, hold cells together, this. is what peels break apart.

stratum germinative

Bascal layer, basement membrane, mitosis takes place in this layer, deepest layer in the epidermis, attached to the papillary dermis

Melanin

Pigment producing protein that helps to protect us from the sun, protects cells by absorbing + blocking uv exposure

Collagen

protein substance of complex fibers that the skin is strength + wound + healing capability

lymphocytes

WBC- part of the immune systems, kills/fights off disease/infection

fiberoblast

cell that contributes to the formation of connective tissue, stimulates collagen + elastin

papillary layer

Dermis to the epidermis connection/ tactile corpuscles

Reticular layer

G.A.G.- hylcronic acid, 70% collagen, elastin

sebaceous glands/oil glands

Attached to upper third of a hair follicle/ 2-3 times larger around facial hair follicles than scalp hair follicles/ open + closed comedones

Sebaceous fat layer/ hyperdermis

fatty layer below dermis/ gives body contour and smoothness

Melanocytes

protection from uv exposure/ skin can repair itself from injury

Heat R

Bodies AV6 temp= 98.6 degrees

arrector pili muscles

Goosebumps

AMP

smaller the molecule, the better the penetration

functions of the skin

Skin absorbs oxygen + dispells carbon dioxide

Secreation

sebaceous glands (oil glands)