The percentage it like 70 or 80 %
Answer:
Lower respiratory tract anatomy
Explanation:
The lower respiratory system, or lower respiratory tract, consists of the trachea, the bronchi and bronchioles, and the alveoli, which make up the lungs. These structures pull in air from the upper respiratory system, absorb the oxygen, and release carbon dioxide in exchange.
Answer:
PE stands for physical Education
its has to do with how long you exercise