## Answers

Musculoskeletal lever system operates due to contraction of skeletal muscles.

#### Explanation:

Muscle is attached to bone by tendon. Tendon is noncontractile white fibrous connective tissue.

Bone is attached to bone by ligament. Ligament is elastic yellow fibrous connective tissue.

When the muscle contracts, tendon is able to pull the attached bone.

So effort is provided by the tendon.

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