muscle movement

junctions between bones

good movement in one plane, little in other direction (knee, elbow)

allows movement in all 3 planes (hip, shoulder)

turn side to side (neck, radiua, ulna near wrist)

upper elbow bone

elbow to pinky

elbow to thumb

flexor, bends arm

extension, straightens arm

lubricates joint to reduce friction

smooth, tough tissue at ends of bones where they meet, reduces friction

seals joint, keeps fluid in

attach muscle to bones, longer than ligaments

attach bone to bone, prevent dislocation, short and tough

multinucleate and long, striped (striated), composed of bundles of muscle cells contained in membrane called sarcolemma, many mitochondria provide ATP

long filaments that make up muscle fibers, made of sarcomeres

modified verson of endoplasmic reciticulum, extends throughout and delivers calcium ions to myofibrils