The chest is a part of the anatomy of humans and various other animals sometimes referred to as the thorax. Chest anatomy - Humans and other hominids In hominids, the chest is the region of the body between the neck and the abdomen, along with its internal organs and other contents. It is mostly protected and supported by the ribcage, spine, and shoulder girdle. Contents of the chest include the following:organsheartlungsmuscles major and minor pectoral musclestrapezius muscles and neckinternal… (More on Chest)