What is the definition for Voluntary Mucles?

There's no muscle type specifically called "Voluntary Muscles". The term you're looking for is Skeletal Muscles.

Here's why:

* Skeletal Muscles are the muscles attached to bones, responsible for movement. They are voluntary, meaning we consciously control their actions.

* Smooth Muscles are found in the walls of internal organs like the stomach and blood vessels. They are involuntary, meaning we don't consciously control them.

* Cardiac Muscle is found only in the heart and is responsible for pumping blood. Like smooth muscles, it is involuntary.

So, "Voluntary Muscles" is a common way to refer to skeletal muscles because we have conscious control over them.