________ allows the muscle to return to its original shape after it has contracted or stretched

______ is when muscle fibers that are stimulated by nerves contract or become short and thick

______ is the ability to be stretched

______ forms the walls of the heart and contracts to circulate blood

_____ is attached to bones and causes body movement

_______ is found in the internal organs of the body, such as those of the digestive and respiratory systems

_____ is moving in a circle at a joint or moving one end of a body part in a circle while the other end remains stationary

_____ is moving a body part away from the midline

_____ is decreasing the angle between two bones or bending a body part

_____ is moving a body part toward the midline

_____ is turning a body part upward

_____ is bending backward or bending the foot toward the knee

_____ is increasing the angle between two bones or straightening a body part

______ is turning a body part around its own axis; turning the head from side to side

_____ is turning a body part downward

_____ is bending forward or bending the foot away from the knee