cell
smallest unit to form life
organ
similar tissue pieces bonded together to have the same function
order small to big
cell, tissue, organ, system, organism
tissue
a group of the same kind of cells that bond together
organ
similar tissue pieces bonded together to have the same function
homeostasis
all systems work together to be in balance
relatively constant state maintained by
physiology of the body
negative feedback
reverses the original stimulus
osteocytes
maintains bone tissue
osteoblasts
lays down bone tissue
bone layer order in to out
periosteum, spongeous/compact, endosteum, bone marrow
periosteum
outer layer
spongeous
middle, bone growth
compact
middle, weight bearing
piezoelectric
has electrical quality passes on charges. can absorb electrical current
young bones
soft and can be bent
puberty
bones dont grow in length and become stiff
bones lose?
density as we age
3 types of muscle tissue
cardiac, skeletal ,smooth
muscles innervated
by nerves
muscles
usually have a muscle belly
neuromuscular junction
motor/trigger point
sarcomere
structure that causes contraction
myocin
thick fibers/filaments, stationary
actin
thin fibers/filaments, moves
myogobin
red pigment throughout the muscle cell
contraction/relaxation
moves nutrients in/out of muscles
massage passively
moves muscles