Muscular System Lab VOCAB

Skeletal muscles

attach to bones via tendon

Origin or Head

muscle end attached to more stationary of two bones

Insertion

muscle end attached to bone with greatest movement

Belly

largest portion of the muscle between origin and insertion

Tendon

dense regular connective tissue with bundles of collagen fibers that attaches a skeletal muscle to the bone

Action

inserted

Prime mover

muscle mainly responsible for a particular movement

Synergist

muscle(s) that aids in the movement of prime mover

Antagonist

muscle(s) that opposes the movement of prime mover

Adduction

movement of the body part towards the midline

Abduction

movement of the body part away from the midline

Protraction

a forward movement of a body part

Retraction

movement of a body part backward

Aponeuroses/Aponeurotica

a sheet of connective tissue (a broad tendon) by which certain muscles are attached to adjacent muscles; found in scalp and in abdomen and in palm

Flexion

bending parts at a joint so that angle between them decreased

Extension

straightening parts of a joint so that the angle between them increases