Muscle action can be voluntary or involuntary.
There are voluntary and involuntary muscles.


Voluntary muscles are the ones that you can control.
Voluntary muscles move your bones around.

Voluntary muscles are under conscious control.
They are under the control of the somatosensory nervous system.


We can’t control involuntary muscles.
Involuntary muscles move automatically.
They don’t need you to think about moving them.

Involuntary muscles are under unconscious control.
They are under the control of the autonomic nervous system.


The muscles in your heart are involuntary muscles.
They move all the time. Even when we’re asleep!


The muscles in the stomach are involuntary muscles.
They help us digest the food.
They move food down to the stomach.
They also keep moving the food along the bowels.