What is the diaphragm primarily responsible for?

The diaphragm is primarily responsible for facilitating breathing. It is a dome-shaped muscle located at the base of the thoracic cavity, separating the chest from the abdomen. When you inhale, the diaphragm contracts and moves downward, increasing the space in the thoracic cavity and allowing the lungs to expand. This expansion creates a vacuum that draws air into the lungs. When you exhale, the diaphragm relaxes, moving back into its dome shape and pushing air out of the lungs. This process is essential for normal respiration and is crucial for oxygenating the blood and removing carbon dioxide from the body. Understanding the primary function of the diaphragm highlights its critical role in the respiratory system, which is vital for sustaining life.