Respiratory system

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Across
  1. 3. Oxygen is more ________ that either food or water. Although people may survive for more than 60 days without food, and several days without water, if they are deprived of oxygen, they will die within a few minutes.
  2. 6. The respiratory system is located in ________ cavity and is protected on both sides by ribs.
  3. 8. The diaphragm is a ______ that helps your lungs pull in air and push it out.
  4. 9. The bronchial tubes are the tubes at the bottom of the _________ that connects into each lung.
  5. 11. The lung lobes are sections of the lungs — _____ lobes in the right lung and two in the left lung.
  6. 14. During _________, or breathing outward, carbon dioxide (collected from the blood) is expelled from the lungs
  7. 16. The throat is the passage which leads from the _______ of the mouth of a person or animal.
  8. 17. ___________ are spongy tissues composed of microscopic cells in which inhaled air is exchanged for carbon dioxide during one breathing cycle.
  9. 18. The pharynx (the throat) is a tube that _______ air from your mouth and nose to the trachea (the windpipe).
  10. 19. The diaphragm is a ____________ wall that separated the thorax, the chest, from the abdomnial region and helps control breathing.
Down
  1. 1. The sinuses are hollow areas between bones in the head that help _______ the temperature and humidity of the air inhaled.
  2. 2. The ribs are bones that surround and ______the lungs and heart.
  3. 4. The trachea is a passage ________ the throat and lungs
  4. 5. The bronchi are small _______ of the bronchial tubes that lead to the alveoli.
  5. 7. The alveoli are tiny air sacs in the lungs where the _______ of oxygen and carbon dioxide takes place.
  6. 10. There are many conditions that can affect the respiratory system. Some develop due to _______ you breathe in from the air, including viruses or bacteria that cause infection.
  7. 12. The larynx also known as the voice box is a ______ organ that allows you to talk and make sounds when air moves in and out.
  8. 13. The mouth and nose pull air from ______ the body and into the respiratory system.
  9. 15. With each breathing cycle, an exchange of gases takes place. During _______ or breathing in through the nose or mouth, oxygen is passed into the blood.
  10. 16. The respiratory system enables __________ and consists of the lungs and air passages.