Muscular System by Zariah Johnson

1. abduction

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moving a body part away from the midline

2. adduction

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moving a body part toward the midline

3. cardiac muscle

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forms the walls of the heart and contracts to circulate blood

4. circumduction

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moving in a circle at a joint, or moving one end of a body part in a circle while the others remain in stationary

5. contract

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when nerves become short and thick

6. contractibility

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muscle fibers that are stimulated by nerves

7. contracture

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a severe tightening of a flexor muscle resulting in bending of a joint

8. dorsiflexion

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bending backward or bending the foot toward the knee

9. elasticity

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

10. excitability

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irritability, the ability to respond to a stimulus such as nerve impulse

11. extensibility

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the ability to be stretched

12. extension

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increasing the angle between two bones, of straightening a body part

13. fascia

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a tough, sheetlike membrane that covers and protects the tissue

14. flexion

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decreasing the angle between two bones, or bending a body part

15. insertion

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the end that moves when the muscle contracts

16. involuntary

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they function without conscious thought or control

17. muscle tone

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a state of partial contraction

18. muscular system

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muscles are the bundle of muscle fibers held together by connective tissue

19. origin

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the end of the bone that does not move

20. plantar flexion

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bending forward or bending the foot away from the knee

21. pronation

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turning a body part downward

22. rotation

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turning a body part around its own axis

23. skeletal muscle

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is attached to bones and causes body movement

24. supination

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turning a body part upward

25. tendons

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strong, tough, fibrous, connective tissue cords

26. visceral( smooth) muscle

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is found in the internal organs of the body like the digestive system, respiratory system, blood vessels, and eyes

27. voluntary

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a person has control over its action