The human body (Muscle power)

Within each large muscle there are hundreds of thinner threads called _____ and ______.

Your biggest muscles are the ones you _____ ____.

The muscle in the mouth is called the ________.

The buttocks muscles are called the _______ ______.

The muscle in the front of the thigh is called the ______.

each muscle fiber is made of thinner parts called _____ and ________.

Muscles have hairlike threads called _________.

In a big muscle, the fibers are about ____ to _____ inches long.

There are ________ of these fibers in a large muscle.

The muscle at the heart is the _______.

Your muscles are controlled by your ______.