Across
- 5. The _____ network is the major site for exchange of substances between the blood and tissues.
- 8. An increase or decrease in blood carbon dioxide level is always accompanied by a change in the concentration of this ion.
- 9. The valve that covers the larynx to prevent food entering into the "wrong tube".
- 10. The intercostal muscles _____ to move rib cage downwards.
- 11. Bulk of carbon dioxide is carried in this form of ion in the blood.
- 13. The mucociliary transport system moves the _____ (and contaminants in it) out of the air way.
- 14. The bronchi further divide into minute branches of _____.
- 16. The term associated with "lungs".
- 18. The type of transport mechanism that occurs in the exchange of gases between the respiratory and circulatory systems.
- 20. The organ that holds the vocal chords.
Down
- 1. The _____ anhydrase is the enzyme that facilitates carbon dioxide reacts with water to form H+ and HCO3-.
- 2. Cells that clean off particles such as dust or micro-organisms.
- 3. The air tube that divides to form bronchi.
- 4. The _____ sac is part of the conducting zone.
- 6. During inspiration, intrapulmonary pressure is _____ than atmospheric pressure.
- 7. During _____, air moves into the lungs.
- 12. It contracts to increase the volume of the thoracic cavity.
- 15. It reduces the surface tension in the pulmonary alveoli.
- 17. One of the factors in blood that affect how much oxygen can combine with hemoglobin.
- 19. Hemoglobin with attached oxygen molecule is called ___hemoglobin.