pectoral muscle diagram

August 03, 2026

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Pectoral muscles (colloquially referred to as " pecs ") are the muscles that connect the front of the human chest with the bones of the upper arm and shoulder. This region contains four muscles that provide movements to the upper limbs or ribs. The pectoral region is located on the anterior chest wall. It contains four muscles that exert a force on the upper limb: the pectoralis major, pectoralis minor, serratus anterior and subclavius. In this article, we shall look at the anatomy of the muscles of the pectoral region – their attachments, actions and innervation. What is pectoralis major muscle & where is it located: its anatomy (clavicular & sternal heads), attachments, vein, blood supply, what functions does it do The pectoralis major (from Latin pectus ' breast ') is a thick, fan-shaped or triangular convergent muscle of the human chest. It makes up the bulk of the chest muscles and lies under the breast. Beneath the pectoralis major is the pectoralis minor muscle. The pectoralis major arises from parts of the clavicle and sternum, costal cartilages of the true ribs, and the aponeurosis of the ... The pectoralis major is a prominent chest muscle that acts mainly on the shoulder joint. Learn the anatomy of the "pecs" now at Kenhub! For related background details, please refer to our report on automotive alternator wiring diagram. These chest exercises from Men's Health editors and fitness experts will help you work out to build bigger, stronger pectoral muscles at the gym or at home. Pectoralis muscle, any of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder. There are two such muscles on each side of the sternum (breastbone) in the human body: the pectoralis major and the pectoralis minor.