Dermis and Hypodermis

papillary layer

superficial thin layer of the dermis

dermal papillae

skin nipples
bumps that bind the epidermis and dermis
create fingerprints

Meissner's corpuscles

sense light touch

capillary loops

where the oxygen and nutrients are dropped off in the dermis (shared with the epidermis)
- where CO2 and waste are removed from the dermis

free nerve endings

sense pain, heat, cold, itching, and tickling

reticular layer

deeper thick layer of dermis
bottom 4/5 of dermis

hair follicle

Living
tunnel where the hair grows from (made of epidermis)

arrector pili muscle

contracts to raise hair on end

sebaceous gland

oil glands
oil is called sebum

sudoriferous gland

sweat gland
merocrine gland

pacinian corpuscle

sense heavy touch (pressure and vibration)

hypodermis

subcutaneous layer

adipose tissue

adheres skin to underlying muscle (anchored loosely enough to allow skin to slide)
- insulates heat
- absorbs shock

sensory nerve

sends messages from the merkel cells, meissner's corpuscle, free nerve ending, and pacinian corpuscles to the brain

motor nerve

sends messages from the brain to the arrector pili muscles, sebaceous glands, and merocrine glands

blood vessels

delivers blood to and from the skin
Artery: drops off blood with oxygen and nutrients, glucose, AA
Vein: takes away blood with CO2 and waste