Final answer:
The local matching of blood flow with ventilation is ventilation-perfusion coupling. It ensures the appropriate exchange of gases in the lungs by regulating blood flow and air flow.
Step-by-step explanation:
The local matching of blood flow with ventilation is ventilation-perfusion coupling. It refers to the process by which blood flow and air flow are regulated to ensure that there is an appropriate exchange of gases in the lungs.
During ventilation-perfusion coupling, areas of the lung that receive more air (ventilation) receive more blood flow (perfusion), and vice versa. This ensures that oxygen can be efficiently supplied to the body's tissues and carbon dioxide can be effectively removed.
For example, if a specific area of the lung is receiving a high amount of air, the blood vessels in that area will dilate to increase blood flow and maximize the exchange of oxygen and carbon dioxide.