Plants and animals are dependent on oxygen for respiration.
- Respiration is the sequence of events resulting in the exchange of oxygen and carbon dioxide between the atmosphere and the body cells.
- Oxygen plays a critical role in respiration, the energy-producing chemistry that drives most living things’ metabolisms.
- Oxygen is generated during photosynthesis by plants and many types of microbes. Plants both use oxygen (during respiration) and produce it (via photosynthesis).