origin

the place on the stationary bone where the muscle attaches

insertion

the muscle's attachment location on the movable bone

size

major (large muscle), minor (small muscle), maximus (largest muscle in the group)

shape

deltoid (triangular), trapezius (trapezoidal), oblique (slanted)

location

sternocleidomastoid

number of origins

biceps brachii (bi- two, ceps- head)

function (the muscle's action)

adductor group (muscles that adduct the thigh)

skeletal muscle

striated, voluntary muscle tissue that is attached to and moves the skeleton

tendon

a type of connective tissue that connects muscle to bone

fascicle

a small bundle of muscle fibers

muscle fiber

a muscle cell

myofibril

one of the functional fibers within a muscle cell that causes contraction by the movement of actin and myosin filaments

actin

one of the two types of protein found in muscle fibers

myosin

one of the two types of protein found in muscle fibers

cardiac

striated, involuntary muscle tissue found only in the heart

smooth muscle

nonstriated, involuntary muscle tissue that is not composed of sarcomeres

sarcomere

one of the functional segments of a muscle

antagonistic pair

a pair of muscles that work together to produce a motion and its opposite motion

the muscle system interacts with......

respiratory, digestive, circulatory, integumentary, and nervous systems