The descending aorta is a major blood vessel that carries oxygen-rich blood from the heart to the lower parts of the body. It is a continuation of the aorta, which is the largest artery in the body. The descending aorta travels down through the chest and into the abdomen, branching off into smaller arteries that supply blood to vital organs and tissues. As it descends, the aorta is divided into two sections: the thoracic aorta, which runs through the chest, and the abdominal aorta, which continues into the abdomen. This structure is crucial for maintaining proper blood flow, ensuring that organs like the kidneys and legs receive the oxygen and nutrients they need to function effectively.