Unit 3 quiz dermis and hypodermis

Dermis

deeper later of the skin; made of connective tissue; broken into 2 layers

Reticular layer

deeper, thick layer of dermis. bottom 4/5 of dermis

Dermis

deeper later of the skin; made of connective tissue; broken into 2 layers

Reticular layer

deeper, thick layer of dermis. bottom 4/5 of dermis

papillary layer

superficial, thin layer of dermis. top 1/5 of dermi

dermal papillae

“skin nipples” - bumps that bind the epidermis and dermis; creates fingerprints

meissner’s corpuscle

sense light touch (m for mouse because they are light)

capillary loops

where 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

hair follicle

tunnel where the hair grows from

arrector pili muscle

contracts to raise hair on end s

sebaceous gland

oil glands - oil is called sebum

sudoriferous gland

sweat glands

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 and absorbs shock

sensory nerve

sends messages from the merkel cells, meissner’s corpuscles, free nerve endings, and pacinian corpuscles to the brain

motor nerve

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

blood vessels

delivers blood to and from the skin

artery (blood vessels)

drops off blood with oxygen and nutrients

vein (blood vessels)

takes away blood with CO2 and waste