masseter
The masseter muscle is the chewing muscle covering the angle of the mandible. During bilateral contraction, the muscle elevates the mandible, raising the lower jaw.
you would be opening and closing your jaw.
It is your jaw-bone. So it helps you chew your food.
The muscle that aids the jaw in closing is the temporalis muscle. The masseter is the muscle that primarily moves the jaw.
The muscle that originates on the temporal fossa is the temporalis muscle. It is a fan-shaped muscle located on the side of the head. It is responsible for the movement of the jaw, including chewing and closing the mouth.
Biting and chewing. This muscle is capable of generating more force (pounds per square inch) than any other muscle in the human body. (It is why an acrobat can spin from a dangling rope while holding onto it with nothing but his or her teeth, leaving the arms and legs free to turn).
The muscle that aids the jaw in closing is the temporalis muscle. The masseter is the muscle that primarily moves the jaw.
The primary muscle used in chewing is called the masseter muscle. There is one on each side of the jaw. They attach to the zygomatic arch (cheekbone) above and the lateral (side) of the mandible (lower jaw). You can feel those muscles flex by placing your hands on the sides of your lower jaw in front of your ears and clenching your teeth.
Stylohyoid Muscle
The maxilla forms the upper jaw. See the related link for more information.
jaw bone jaw muscle