The diaphragm is a thin, dome-shaped muscle that plays a crucial role in respiration. It separates two major cavities in the human body: the thoracic cavity and the abdominal cavity.
Explanation: The thoracic cavity, located above the diaphragm, houses the heart and lungs. It is protected by the rib cage and is responsible for the respiratory process. When we breathe in, the diaphragm contracts and moves downward, increasing the space in the thoracic cavity and allowing air to flow into the lungs.
Below the diaphragm is the abdominal cavity, which contains vital organs such as the stomach, liver, intestines, and kidneys. The abdominal cavity plays a significant role in digestion and other bodily functions.
In summary, the diaphragm serves as a dividing wall between these two important cavities, facilitating not just respiration but also contributing to the pressure changes necessary for the functioning of the abdomen.