Oxygen Cycle

MADE BY – NAME: ASHUTOSH modi

Required for Life

All living things use oxygen or depend on organisms that use oxygen in some way.

All Animals and Other Consumers Use Oxygen

We use oxygen to break down simple sugar and release energy.

This can be done through respiration or fermentation.

Animals mainly use respiration.

Respiration

The process that breaks apart simple food molecules to release energy.

It occurs inside cells.

What YOU do with the oxygen you take in.

Respiration in Cells

In our cells, oxygen is used to split glucose apart — releasing energy, water and carbon dioxide.

Photosynthesis

Plants take in carbon dioxide and water and use them to make food. Their food is simple sugar — glucose.

Photosynthesis

Plants pull the carbon off CO2 and use the carbon in glucose. (They do not need the oxygen for this. They get that from water, H2O.)

Plants release the oxygen (O2) back into the atmosphere.

Other organisms use the free oxygen for respiration.

How are photosynthesis and cellular respiration dissimilar?

Photosynthesis uses carbon dioxide and produces oxygen.

Cellular respiration uses oxygen and produces carbon dioxide.

Basic idea

Rabbit eats food, breaks it down and releases CO2.

Plant uses CO2 to make food.

Rabbit gives off CO2, which is taken in by the plant.

Plant gives off O2, which is taken in by the rabbit.

Respiration

Photosynthesis

Everywhere

This happens on land and in the water.

Algae and aquatic plants produce food underwater through photosynthesis.

They use CO2 dissolved in the water.

Other aquatic organisms use the dissolved oxygen these plants release into the water.