The diaphragm is a muscle located beneath your lungs and operates in the respiratory system. When you breathe in or out it either expands or contracts, pushing your lungs up to release air or relaxing to allow air to enter the lungs.
Asked in Respiratory System
How do the rib cage enable man's respiratory system to work efficiently?
Moves upwards and outwards as the diaphram moves downwards to expand the thoracic cavity. ...