What seperates the lungs and heart from the organs in the abdomen?

The lungs and heart are separated from the abdominal organs by the diaphragm, a muscular structure that plays a key role in respiration. The diaphragm forms the boundary between the thoracic cavity, which houses the heart and lungs, and the abdominal cavity, which contains organs such as the stomach, liver, and intestines. This separation is crucial for the distinct functions of these organ systems and helps maintain pressure differences necessary for breathing. Additionally, the thoracic cavity is protected by the ribcage, while the abdominal cavity is protected by the abdominal wall.