Anatomy

Chapter 5

13 cards·by shenderson8

4 major types of cells in the epidermis

keratinocytes, melanocytes, langerhan cells, merkel cells

3 major layers of the skin

epidermis (outer layer), dermis (inner layer), sub q or hypodermis (underneath dermis)

5 functions of integumentary system

maintains the bodys integrity, maintains temp, initiates synthesis vitamin d, provides sensory information, maintains homeostasis

produces keratin - a tough fibrous protein that provides protection

keratinocytes

produces the pigment melanin

melanocytes

involved in the immune responses

intraepidermal macrophages (langerhan cells)

function in the sensation of touch

tactile epithelial cells (merkel)

four layers in thin skin, extra layer in thick skin. put them deepest to superficial

stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (thick), stratum corneum

composed of connective tissue containing collagen and elastic fibers, contains blood vessels that supply the skin and regulate body temp

the dermis

two regions of the dermis

papillary region (just below epidermis), reticular region (dense irregular connective)

3 layers of dermis

papillary layer, reticular layer, subcutaneous layer (hypodermis)

accessory structures of skin

hair, nails, glands

4 types of skin glands

sebacous gland (oil), eccrine gland (sweat), apocrine gland (sweat on hairy skin), ceruminous gland (wax)