Pectoralis major
heart
The Diaphragm
Serratus Anterior
diaphragm.
On the chest wall
diaphragm
Chest, breast, thoracic wall. from latin pectus
The heart is located in the mediastinum, in the center of the chest. It contains cardiac muscle fibers.
The muscle that is located on the ventral (anterior) side of the body is the pectorals major. The pectorals major is located in the chest of the human body/
Pectoralis major and pectoralis minor
a hernia is caused by the opening of the chest cavity which causes a weakening in the muscle wall.
The deepest muscle of the chest is the serratus anterior.
It is actually a lower back muscle that is located in the posterior abdominal wall