Dermis/ Subcutaneous Layers

Sebacuous glands

(oil glands) releases "sebum" which nourishes our skin and hair, keeping them healthy. Too much sebum causes oily skin and hair. Connects to the hair follicle

veins

blue, deoxygenated, carry blood to the heart

What causes acne and scarring?

clogged pore under the epidermis

lamellar corpuscle

deep pressure receptor

reticular layer

deepest portion of dermis, busiest part

Genetics

determines thickness and pattern distribution

decreased size of sebaceous glands causes

dry skin

What creates blackheads and pimples?

enlarged sebaceous gland

apocrine glands

forms during puberty, underarms/groins, produces a mucous fluid, smell comes from bacteria feeding on it, breaks down and causes odor, attaches to opening where hair comes through epidermis, located deeper than eccrine

subcutaneous layer (hypodermis)

innermost layer of the skin, containing fat tissue (adipose)

hair follicle

located surrounding hair bulb/root, where hair starts to grow, protects hair root

hair shaft

part of hair that is visible

arteries

red, carry oxygen, blood away from the heart

arrector pili

smooth muscle attached to hair follicle, when it contracts it extends the hair shaft, causing goose bumps

Hair

FUNCTION: protects the body LOCATION: everywhere on body other than palms of hands, palmer surface of fingers, soles, plantar surface of toes and foot

Collagen and elastic fibers

gives the skin ability to stretch and return to original shape

decreased production of melanin produces

gray hair

sudoriferous glands

sweat glands

Papillary Layer of the Dermis

upper layer FUNCTION: pain receptors, fingerprints, nourishment to epidermis

eccrine glands

we have when we are born, found all over, releases heat, fights bacteria, closer to surface, more numerous than apocrine, attaches to sweat pore

hair bulb/root

where hair is nourished by blood vessels. inferior portion enlarged area

decreased collagen produces

wrinkles