Musculature (noun)

1. The system of muscles in an organism, especially in the human body.
2. The muscle tissue of an animal or human body considered as a whole.

Origin:

From the latin word musculus meaning "little mouse".

Examples:

1. The musculature of a bodybuilder is typically highly developed.
2. The musculature of a sprinter is different from that of a marathon runner.
3. The musculature of a fish is adapted for swimming.
4. He had a powerful musculature and was able to lift heavy weights.
5. Proper exercise is essential to maintain a healthy musculature.