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case 6 (skin (functions (protection, excretion, maintenance of temperature…
case 6
skin
layers
epidermis
self regulating epithelium
contains no blood vessels
cells found in the epidermis
keratinocytes
produce keratin
melanocytes
produce malanin
langerhans cells
part of the immune response
Merkel's cells
detect touch
dermis
fibrocollagenous and elastic tissue
contains blood vessels, nerves and sensory receptors
subcutaneous/hypodermis
mainly adipose tissue
contains larger vessels to supply and drain dermal vasculaculture
functions
protection
excretion
maintenance of temperature
production of melanin
production of keratin
vitamin D3 synthesis
storage of lipids
sensation
components
arrector pilli
causes hair to stand on end (through contraction)
sebaceous gland
when arrector pilli contacts releases sebum
sensory nerves
meissener's corpuscle
touch
pacinian corpuscle
pressure and pain
free nerve ending
temperature and touch