ANATOMY

Detailed explanation-1: -The three parts of a muscle are origin, insertion, and center. False-The three parts of a muscle are origin, insertion, and belly. The chief motor nerve of the face is the fifth cranial nerve.

Detailed explanation-2: -Perimysium: The middle layer surrounding bundles of muscle fibers. Endomysium: The innermost layer surrounding individual muscle fibers.

Detailed explanation-3: -What is true of the origin part of a muscle? It is attached to the skeleton.

Detailed explanation-4: -A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.

Detailed explanation-5: -The origin of a muscle is the end of the muscle attached to an immovable part. The insertion is the end of a muscle attached to a moveable part. When a muscle contracts, the insertion is pulled toward the origin.