👉 Subdiaphragmaty is a term used in anatomy and physiology to describe the space between the diaphragm, which is the main muscle that moves the chest up and down during breathing. It is located below the sternum, just above the costal cartilage. The subdiaphragmaty has many important functions, including helping to maintain a stable posture, regulating breathing by controlling the volume of air entering and leaving the lungs, and providing a protective layer for the heart.