-Physical Protection

-synthesizes vitamin D3

-houses sensory receptors

-regulates body temperature

1.  epidermis

2.  dermis

3. subcutaneous

part of epidermis-

has stem cells

has melanocytes

differenciate into keratinocytes

produce protein

fill with protein and die

become interlocked

part of dermis

loose CT

part of dermis

dense irregular CT

part of dermis

where surgeons make incisions

hair papilla

hair matrix

center of hair shaft is medulla

around medulla is cortex-crunchy

outermost-cuticle-chewy

Round-straight

oval-wavy

flat-curly

gorwth in root

lunula-white moon at bottom of nail

eponychium-cuticle

hyponichium-underneath tip of nail

tip of cell and contents

ex. arm pits, nipples

high concentration

ex. hands, feet

ceruminous glands

outer ear canal

protects against bacteria