diaphragm (anatomy)

The diaphragm is a dome-shaped muscle located beneath the lungs and heart, separating the chest cavity from the abdomen. It plays a vital role in breathing by contracting and moving downward when you inhale, which creates space in the chest for lungs to expand and fill with air. During exhalation, the diaphragm relaxes and moves upward, helping push air out of the lungs. Its coordinated movement is essential for efficient respiration and overall oxygen intake, making it a key muscle for both breathing and core stability.