Your abdominals work hard when you swim. Also your legs if your kicking, and your shoulders push the water to move you forward.
all muscle groups are used.
they relate because they dont move. ivoluntary muscle means that they dont move. the smooth muscle doesnt move at all only the skeletal muscle does.
They swim.
They swim
To move a voluntary muscle, you just want to do it. When you want to walk, the nervous system sends a signal to the brain and the skeletal muscle to move your legs. So you are making your leg move by voluntary muscle, which is skeletal muscle.
When you want to move a muscle, your brain sends a message out to the muscle you want to move, and the muscle sends a message back to your brain that your moving it and where.
To help the fish to swim.
So they can swim
They swim
they swim
They swim
they swim