The Respiratory System

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Across
  1. 3. Commonly known as the windpipe. A tube that connects the nose and mouth to the lungs and it runs down the neck and upper chest, carrying air to and from the bronchi.
  2. 5. The delivery of oxygen from the alveoli to the blood, and the elimination of carbon dioxide from the blood to the alveoli.
  3. 6. The smallest unit within an organism that can carry out life processes (growth, reproduction, respiration…).
  4. 7. A chemical reaction between oxygen and glucose (sugar) that produces energy and releases carbon dioxide as waste. Takes place in all body cells.
Down
  1. 1. Organisms that are made up of more than one cell. Example: Animals and Plants.
  2. 2. The physical movement of air inside and outside the Respiratory System.
  3. 4. Tiny sacs at the end of each bronchiole, where gas exchange takes place.