What does the pectoral muscle mean?

Pectoral muscle is the muscle of the chest, which consists of two parts, namely pectoralis major, which is fan-shaped. It is located in the anterior upper part of the thorax, starting from the medial half of the clavicle, sternum and 1~6 costal cartilage, and the muscle bundle is concentrated to the outside and ends at the crest of the greater tubercle of humerus.

Pectoralis major can be exercised by supine birds and pectoralis major. Developed pectoral muscles are an important part of male sexy characteristics.