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A muscle is made of many cylindrical muscle fibers. The many fibers are bound together with connective tissue. Nerves and blood vessels (arteries and veins) run along the connective tissue.

In every muscle fiber, there are thick filaments, made of the protein myosin, and thin filaments, made of the protein actin. The filaments overlap to form the sarcomere, a part of the muscle. Myosin has little heads that attach to actin, and pull on it. This is when the sarcomere contracts, and when all of the sarcomeres of a muscle contract, the entire muscle contracts.

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14y ago
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15y ago

Majority of the muscle is made from protein. Major part of American diet that include protein are meat.

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13y ago

Muscles are made from fibres

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8y ago

A group of muscle cells

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14y ago

Fibers

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Q: What is a muscle made from?
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