Thorax Flat Introduction The rib cage, or chest cavity, is an organ that is located in the center of the chest and performs vital functions in the human body. It is one of the most important parts of the body and is responsible for storing and transporting oxygen and carbon dioxide throughout the body, as well as regulating body temperature. The importance of the chest to the body explains why its condition affects overall health, and many diseases can affect this organ. One of these diseases is flat chest, or so-called. chest flat. Description of the disease Flat chest is a condition in which the chest wall becomes too thin and flat, which can lead to various problems in the body,