anatomy and physiology(integumentary system)

cutaneous membrane

skin

cutaneous membrane

what is the largest organ in the body?

epidermis and dermis

two principal parts of cutaneous layer

epidermis

thin, superficial

dermis

thicker, deep

body temperature and protection

list 2 functions of the skin

langerhans cells

immune response

merkel cells

touch

stratum basale

stratum spinosum

stratum granulosum

stratum lucidum

stratum corneum

list the epidermis strata from deep to superficial

the bottom layers 

what layers of the epidermis strata have live cells?

stratum lucidum

which layer is only in thick skin?

stratum basale

stem cells divide and produce keratinocytes which get pushed up

dermis

dense irregular connective tissue with collagen and elastic fibers

papillary and reticular

what are the two regions of the dermis?

papillary

thin collagen and elastic fibers(fingerprints and footprints)

reticular

deeper portion of dermis, thick collagen and some elastic fibers

sebaceous

oil glands

sudoriferous

sweat glands

eccrine

apocrine

ceruminous

3 parts of sudoriferous glands

eccrine

emotional stress

apocrine

causes body odor

ceruminous

only in ear canal

lanugo and vellus

two types of hair

lanugo

covers the fetus

vellus

short, fine, pale hairs

lunula

whiter area of the nail

thick skin

only palms and bottom of feet

thin skin

everywhere else and does have hair

sebaceous glands

thin skin is present in 

sudoriferous glands

thick skin is present in