Chapter 6 Flashcards
define tissue
group of cells that has a specific job
define nutrient
anything needed for life
define organ
group of tissues with a specific job
what is the cutaneous membrane
skin
give 4 functions of the skin/cutaneous membrane
regulates body temp, retains water, excretes waste, protects
define accessory organs
extra organs
what are the 2 distinct layers of the skin
epidermis and dermis
give 3 facts about the epidermis
out layer
dead cells
no blood vessels
what is keratinization
waterproofing
what are calluses
areas that skin is rubbed or pressed regularly
give 2 facts about skin color
due to melanin
environmental factors also influence it
define cyanosis
blood low in oxygen appears blue
define jaundice
condition in newborns with a buildup of bilirubin and turns skin yellow
give 3 facts about the dermis
inner layer
live cells
has blood vessels
what is the subcutaneous layer for
helps insulate body
define adipose tissue
fat
what are nails for
protection
define nail plate, nail bed, and lunula
nail plate- overlies surface of skin
nail bed- under nail plate
lunula- whitish half moon of nail
what nail grows the slowest and fastest
slowest- thumbnail
fastest- middle finger
give 3 places where there are no hair follicles
lips, palms, soles
define hair follicle
base of a tube that makes hair
define hair root
below skin
define shaft
outside skin
tell the amounts of melanin in the following: dark, blonde, white, red, grey
dark- alot of melanin blonde- not much white- none red- has trichosiderin grey- mix of some and none
