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Skeletal Muscle System

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English exercise "Skeletal Muscle System" created by anonyme with The test builder.
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1. There are over 600 contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know in the human body.

2. They are wrapped around each other in intricate patterns, and attached to the bones of the skeleton by tough, fibrous bands of tissue called contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know.

3. The contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know system and the muscular system are intimately linked, each depending on the other to function.

4. A skeletal muscle usually attaches onto one end of a bone, stretches across a contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know and then tapers out into a tendon attached to another bone.

5. When the muscle contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know, it moves one bone while the other remains static, and the joint acts like a hinge.

6. For example, the fingers close when muscles in the forearm contract, pulling tendons that run through the contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know of the hand to the bones in each finger.

7. Many of the muscles in the trunk and limbs remain partly contracted all the time, a condition called muscle contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know.

8. This enables the large muscles in the back and neck, for example, to maintain body contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know and keep the head upright.

9. Because muscles can only contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know, and not push, they are arranged in opposition to each other. For example, movement of the forearm is controlled by the biceps in the top of the upper arm, and the triceps in the bottom of the upper arm.

10. When the biceps contracts, the forearm folds upwards (flexion); when the triceps contracts, the biceps relaxes and the forearm contractsjointmusclespalmposturepullskeletalstretches outtendonstone I don't know(extension).