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MuscularSystem Mrs.D

Definitions on Muscular System

QuestionAnswer
Abduction- Moving a body part closer to the midline
Adduction- Moving a body part away from the midline
Flexion- Decreasing the angle between two bones or bending a body part
Extension- Increasing the angle between two bones or straightning a body part
Rotation- Turning a body part on its own axis (head turning)
Circumduction- Movin in a circle at a joint or moving one en of a body part as the other end stays stationary
Muscle system- Made up of over 600 muscles
Excitability- Irritability, the ability to respond to stimulus such as nerve impulse
Contractibility- Muscle fibers contract, which cause movement
Extensibility- The ability to be stretched
Elasticity- Allows the muscle to return back to its normal shape after it has been contracted or stretched
Cardic muscle- Forms the walls of the heart and contracts to make blood flow. Involuntary
Visceral/smooth muscle- Found in the inner organs such as the digestive system and reproductive system, and in blood vessels and in the eyes. They contract to cause movement in these organs. Involuntary
Contracture- Severe tightning of a flexor muscle resulting in the bending of a joint
Insertion- The en of a muscle attached to a bone that moves when it contracts
Origin- The end of a muscle attached to a bone that doesnt move
Skeletal muscle- Muscle attached to the bone that makes the body move
Muscle Tone- State of partial contraction
Tendon- Strong, tough, connective tissue cords
Fascia- Sheet-like membrane that covers the tissue
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