Cách sử dụng
An alveolus is a tiny air sac in the lungs where the exchange of oxygen and carbon dioxide takes place. It is a part of the respiratory system and helps us to breathe properly. When we inhale air, it enters the lungs and fills up these tiny sacs, which then absorb oxygen and release carbon dioxide. The word 'alveolus' is used in medical and scientific contexts when referring to the structure and function of the lungs.