A1.2.3.1 Oxygen Cycle
The oxygen cycle involves the movement of oxygen between the atmosphere, water bodies and land.
The oxygen cycle is less complex than other cycles. There are two main processes:
- Respiration.
- Photosynthesis.
Respiration:
Humans and animals inspire oxygen from the air to breath. During the respiration process, Carbon Dioxide is expired.
Source: http://www.fda.gov/Fdac/features/1999/emphside.html