respiratory system vocab.

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Across
  1. 3. each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed. Lungs are characteristic of vertebrates other than fish, though similar structures are present in some other animal groups
  2. 4. Membrane: smooth membrane consisting of a thin layer of cells which secrete serous fluid
  3. 6. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs
  4. 8. system: The respiratory system is the set of organs that allows a person to breathe and exchange oxygen and carbon dioxide throughout the body.
  5. 10. a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe
  6. 12. any of the major air passages of the lungs that diverge from the windpipe
  7. 13. the action of inhaling or breathing in
  8. 14. any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place
  9. 16. the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus
Down
  1. 1. Respiration: The chemical process that generates most of the energy in the cell, supplying molecules needed to make the metabolic reactions of an organism run
  2. 2. Cardiopulmonary Resuscitation (CPR) consists of mouth-to-mouth respiration and chest compression. CPR allows oxygenated blood to circulate to vital organs such as the brain and heart.
  3. 5. the process or action of exhaling
  4. 7. Exchange: The diffusion of gases from an area of higher concentration to an area of lower concentration, especially the exchange of oxygen and carbon dioxide between an organism and its environment
  5. 8. a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances
  6. 9. an eyelash, or a delicate hairlike structure that resembles one
  7. 11. each of a number of fine chitinous tubes in the body of an insect, conveying air directly to the tissues
  8. 15. the hollow muscular organ forming an air passage to the lungs and holding the vocal cords in humans and other mammals