1. Respiration begins with ____________. 2. Gas exchange is needed to provide cells with the ____________ they need for cellular respiration. 3. Tiny air sacs in the lungs are known as ____________. 4. Inhaling is an active movement that results from the contraction of a muscle called the ____________. 5. Asthma is a disease in which the air passages of the ____________ become narrow, often with excessive mucus production. 6. The ____________ is also known as the wind pipe. 7. Emphysema is usually caused by ____________ and is irreversible. 8. The ____________ is also known as the voice box. 9. The ____________ pumps oxygen-rich blood into arteries. 10. ____________ gas exchange is the exchange of gases between inhaled air and the blood. 11. ____________ is a disease in which some of the alveoli of the lungs fill with fluid so gas exchange cannot occur. 12. Oxygen ____________ from the peripheral capillaries into body cells.
