Chest

Chest (Pectoral Muscles)

The pectoral muscles, colloquially known as "pecs," are a group of muscles located on the front of the human chest, connecting the upper extremities to the anterior and lateral thoracic walls. The main muscles include the pectoralis major (the bulk of the chest muscle), pectoralis minor (a thinner muscle beneath the major), serratus anterior, and subclavius.

These muscles are responsible for a wide range of movements of the upper limbs and ribs. The pectoralis major primarily flexes, extends, adducts (moves towards the body), and internally rotates the humerus (upper arm bone). The pectoralis minor helps stabilize the scapula (shoulder blade), pulling it downward and forward. The serratus anterior moves the scapula forward around the torso, as in throwing a punch, and the subclavius helps depress the shoulder and elevate the first rib.