No, oxygen is not an organ at all. It's a gas. However, it is inhaled and exhaled through the respiratory system.
Respiratory system
Respiratory System
respiratory system
The Respiratory System. I like platypuses.
Respiratory system
The most important organ of our respiratory system is the Lungs. The lungs are the organs that extract or absorb oxygen from the air we breathe and fills our blood with life giving oxygen.
To gain oxygen and to lose CO2.
Actually, earthworms have no respiratory system at all, they get the oxygen and nitrogen that they need from the soil.
the (circulatory) respiratory system (blood flow carries oxygen)
The respiratory system obtains the oxygen, the cirrculatory system carries it to different parts in the body.
One of the many functions of the circulatory system is to bring oxygen to cells.
To gain oxygen and to lose CO2.