muscle

Contractile tissue in animals that enables movement through coordinated fiber contraction.

Skeletal muscle attaches to bones via tendons, allowing voluntary movement and posture control. Smooth muscle lines internal organs like the stomach and blood vessels, operating involuntarily. Cardiac muscle drives the heart with rhythmic, self-sustaining contractions.

Muscle tissue converts chemical energy from ATP into mechanical force. Training and nutrition determine muscle adaptation, growth, and endurance capacity.

All three muscle types share the fundamental property of excitability, contractility, extensibility, and elasticity.

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