The upper front part of the body between the neck and stomach.
Upper part of the torso, the thorax; also called pectus.
The chest, or thorax, is the upper part of the trunk. It is enclosed by the breastbone (sternum) and the 12 ribs which join the sternum by way of cartilages, and are attached to the spine behind. At the top of the thorax, the opening between the first ribs admits the windpipe (trachea), the gullet (oesophagus) and the large blood vessels. The bottom of the thorax is separated from the abdomen below by the muscular diaphragm which is the main muscle of breathing. Other muscles of respiration, the intercostal muscles, lie between the ribs. Overlying the ribs are layers of muscle and soft tissue including the breast tissue.
The thorax, including all the organs (e.g., heart, great vessels, esophagus, trachea, lungs) and tissues (bone, muscle, fat) that lie between the base of the neck and the diaphragm.
The thorax, commonly recognized as the chest, encompasses the upper section of the trunk, spanning from the neck’s base to the muscular diaphragm situated below.