Pectoralis Major Muscle 04

• 
• 

← Template Index →

Download this template, plus more (25 in all)

The pectoralis major is situated at the chest (anterior) of the body. It is a thick, fan-shaped muscle, in males it makes up the bulk of the chest muscles and in females it lies under the breast. The actions of the pectoralis major muscle are movement of the shoulder joint, such as throwing a ball side-arm, lifting a child, flapping the arms, arm-wrestling, it aids in deep inspiration, as in taking a deep breath before jumping in a pool, and is responsible for keeping the arm attached to the trunk of the body.