Question

Trace the path of an oxygen molecule.

Answer 1

Answer:

I think this is how it goes

1. Nose/mouth

2.  Pharynx

3. Larynx

3.Trachea

4.Bronchi

5.Alveoli

6.Heart

7.Blood Vessels

Explanation: it starts out from the nose then continues down to through the lung system then the heart to the blood stream