Here's why:
* Skeletal muscle is responsible for voluntary movements, like moving your arm, fingers, and legs.
* Smooth muscle controls involuntary movements, like the contractions of your digestive system.
* Cardiac muscle is found only in the heart and is responsible for pumping blood.
When you decide to move your arm to use the mouse, your brain sends signals to the skeletal muscles in your arm, causing them to contract and move the bones in your arm.
