oxygen
The heart gets the oxygen from the red blood cells that "trade" CO2 for oxygen in the lungs and travels back up to the heart and gives the heart a bit of the oxygen and then gives the rest of the oxygen to the other organs (like the alveoli and the liver and the gut ect)
It is because there is a lot of trees around us and it gives out oxygen for us during photosynthesis.
Oxygen is the principal component of atmospheric air (approx. 80 %).
Carbon Oxygen
Plankton gives more oxygen to the atmosphere.
Plants gives us most of our oxygen in the atmosphere.
Ficus religiosa (Peepal Tree) gives oxygen at night also.
gives oxygen
gives oxygen
gives oxygen
it gives you energy from oxygen.
gives oxygen
the lung
Oxygen
Yes
oxygen