Chapter 11.3, Problem 11BYGO

Summary Introduction

To determine:

The different muscles that fit in the following descriptions: The muscle that lies beside the radius and straightens the wrist, the muscle that pulls down the corners of the mouth at the time of frowning, the muscle that helps in raising the blades of the shoulders, the movement of little finger laterally away from the fourth digit due to the presence of the specific muscle and the largest muscle that is present deep into the breast.

Introduction:

The muscles present in the face of the humans are more expressive than the muscles of any other mammal. These facial muscles are inserted in the dermis and subcutaneous tissue. The different proteins that help in the movement of the muscles with the contraction and relaxation are actin and myosin.