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Key Terms

Muscular System

QuestionAnswer
Adduction moving a body part toward the midline
Abduction moving a body part away from the midline
Cardiac muscle forms the wall of the heart and contracts to circulate blood
Circumduction Moving in a circle at a joint or moving one end of a body part oin a circle while the other end remains stationary, such as swinging an arm in a circle
Contract nerves become short and thick
Contractability muscle fibers that are stimulated by nerves coontract, which cause movement
Contractures severe tightening of a flexor muscle resulting in bending at a joint caused by lack of use
Elasticity Allowas the muscle to return to its original shape after it has contracted or streched
Excitability irritability; the ability to respond to a stimulus such as nerve impulse
Extensibility the ability to be streched
Extension Increasing the muscle between two bones or straightening a body part
Fascia A tough, sheetlike membrave that covers and protects the tissue
Flexion decreasing the angle between two bones or bending a body part
Insertion the end that moves when a muscle contracts
Involuntary Muscle function without conscious thought or control
Muscle tone state of partial contraction and is sometimes described as a state of readiness to act
Muscular System made of over 600 muscles
Origin When a muscle attaches to a bone, the end that does not move
Rotation turning a body part around its own axis; for example,turning the head from side to side.
Skeletal muscle It attaches to the bone and causes body movements
Tendons Strong, though connective tissue cords that attach some muscles
Visceral(smooth) muscle is found in the internal organs of the body (digestive,, respiratory systems, blood vessels and eyes) It contracts to cause movement in these organs
Voluntary A person has control over these muscles
Created by: dp