Respiration

Respiration is the process by which living organisms take in oxygen and release carbon dioxide. It involves both breathing (the mechanical process of inhaling and exhaling) and cellular respiration (the chemical process by which cells generate energy).

Breathing

Breathing is the first step in the process of respiration. When we inhale, we take in oxygen-rich air, and when we exhale, we release carbon dioxide-rich air. This exchange of gases occurs in the lungs, where oxygen is absorbed into the bloodstream and transported to the cells, while carbon dioxide is removed from the bloodstream and expelled from the body.

Cellular Respiration

Once oxygen is delivered to the cells, it is used in a process called cellular respiration. This process takes place in the mitochondria of the cell and involves the breakdown of glucose (sugar) to produce energy in the form of adenosine triphosphate (ATP), as well as carbon dioxide and water as byproducts.

Study Guide

1. What is respiration?
2. Describe the process of breathing.
3. Explain the role of cellular respiration in producing energy.
4. What are the byproducts of cellular respiration?
5. How is oxygen transported from the lungs to the cells?

Understanding the process of respiration is important for understanding how living organisms obtain the energy they need to survive and carry out their daily activities.

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