What does a voluntary muscle do for the muscular system?

Voluntary muscles are those muscles that are under conscious control. They can be contracted and relaxed at will, and they are used for a variety of purposes, including:

- Movement: Voluntary muscles are responsible for the movement of the limbs, head, and trunk. They allow us to walk, run, jump, and perform other physical activities.

- Posture: Voluntary muscles help to maintain posture by keeping the body upright and in balance.

- Heat production: Voluntary muscles produce heat when they contract, which helps to keep the body warm.

- Protection: Voluntary muscles can be used to protect the body from injury. For example, we can contract our muscles to tense up and protect ourselves from a blow.

Voluntary muscles are an important part of the muscular system. They allow us to move, maintain posture, produce heat, and protect ourselves from injury.