Respuesta :
The second option
1. Air goes through your mouth and down your trachea
2. Trachea splits into bronchi
3. Bronchi splits into capillaries
4. Capillaries end in alveoli where the gas exchange occurs.
1. Air goes through your mouth and down your trachea
2. Trachea splits into bronchi
3. Bronchi splits into capillaries
4. Capillaries end in alveoli where the gas exchange occurs.