tüdgázcsere
Tüdőgázcsere, also known as respiration or gas exchange in the lungs, is the physiological process by which oxygen from the inhaled air passes into the blood and carbon dioxide from the blood passes into the air to be exhaled. This vital exchange occurs in the alveoli, tiny air sacs within the lungs, and the capillaries, small blood vessels that surround them.
The process is driven by differences in partial pressures of the gases. Oxygen is present in higher
Conversely, carbon dioxide is present in higher concentration in the blood returning from the body's tissues