Skin Structure Flashcards
2 divisions of skin
epidermis (outermost and thinnest) and dermis (inner and 25x thicker than epidermis)
Outermost layer of epidermis, made of keratin, horny layer
stratum corneum
transparent layer of epidermis, thicker on palms and soles
stratum lucidum
Granular layer of epidermis where dead cells are pushed to surface to replace dead cells shed from stratum corneum
Stratum Granulosum
Spiny layer of epidermis where skin shedding begins
stratum spinosum
basal cell layer of epidermis that produces new epidermal skin cells; contains melanocytes
stratum germinativum
Which layer of the dermis is where touch sensations originate
papillary layer
deeper layer of dermis that supplies skin with oxygen and nutrients
reticular layer
water makes up to what percent of body weight
50 - 70%
Small cone shaped elevations at the base of hair follicles
dermal papillae
The coiled base of sudoriferous glands
secretary coil
Fibrous protein that gives skin flexibility and helps skin regain shape after being expanded
elastin
As cells die, they are pushed to the surface to replace dead cells that are shed from the
a. stratum corneum
b. stratum lucidum
c. stratum germinativum
d. stratum granulosum
a. stratum corneum
the layer directly beneath the epidermis is the
a. reticular layer
b. stratum spinosum
c. papillary layer
d. subcutaneous tissue
c. papillary layer
skin gets its strength, form, and flexibility from
a. collagen and keratin
b. sebum and melanin
c. keratin and elastin
d. collagen and elastin
d. collagen and elastin
