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Most muscles are connected to bones.
Muscles are connected to bones by tendons.

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Muscles are contractile tissue.
Muscles can contract and relax.

How do muscles move bones?
Muscles move the bones by contracting and relaxing.
Movement in the body is the result of muscle contraction.

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When muscles contract, they get shorter.
When muscles relax, they get longer.

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The biceps and the triceps come in pairs and work together.

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When the biceps contract, the triceps relax.
When the triceps contract, the biceps relax.

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When we bend our arm, the biceps contract and the triceps relax.
When we stretch our arm, the triceps contract and the biceps relax.

Muscles moving your bones – LearningScience.org
Jared show us how muscles move bones.
Source | FunScienceDemos

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