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Yes.

In fact, all living organisms must respire. If a cell stops respiring, it dies.

Respiration in everyday speech means "breathing", but in Biology cellular respiration means taking a chemical substance that is energy-rich, such as a molecule of glucose, and breaking it down to release the energy from it. All animals do this, or they would not have the energy to resist decomposition. Quite simply, they would fall apart!

Animals have two main ways to break down glucose. A little energy comes from what is called anaerobic respiration, which means respiring without oxygen. We do this when we exercise hard, and make lactic acid in our muscles. The main way, though, is to break down the glucose completely to carbon dioxide and water, and obtain much more energy in the process. This needs oxygen, and is called aerobic respiration.

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