unit 2 Flashcards
epidermis transport___
transport O2 and nutrient via diffusion
Sensory receptor detect what
Heat cold, rain, and pressure
Dermis is what?
vascular(with blood)
Hypodermis
is vascular not part of the skin also has loose connective tissue and adipose.
thermoregulation relies on…
Relies on negative loop to maintain stable internal temperature
produced heat
muscle contraction
Calcium and vitamin D explain
without vitamin D, we cannot make this hormone calcitriol
without calcitriol, we can’t absorb calcium
vitamin D > calcitriol > help absorb calcium
without calcium or nerve don’t function properly
dendritic cells
locate in stratum spinosum
phagocytes of immune system (fight foreign invaders)
Merkel cell
Locate stratum basale
Sensory detect light touch
ex: fingertip lips and at base of hairs
melanocytes(melanin)
locate in stratum basale
Produce melanin melanin protect skin
thick skin
all five epidermal layers
No hair follicle
Thick stratum corneum
thin skin
has only four layers, no stratum lucidum
Many hair sweat and sebaceous Gland
ex: think of hair folicle
erythema
Increase blood flow
pallor
Decrease blood flow
cynosis
Low oxygenated blood
