Respiratory System

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Across
  1. 1. stores urine
  2. 8. flow of blood from the heart to the lungs and back to the heart
  3. 9. metabolic wastes are eliminated from the body
  4. 10. act of taking in air
Down
  1. 2. Tissue that seals off the windpipe and prevents food from enterin.
  2. 3. Filters waste from the blood like urea,
  3. 4. two openings in the nose.
  4. 5. a condition in which blood flow to part of the heart muscle is blocked, causing heart cells to die
  5. 6. Breathing out
  6. 7. voice box; passageway for air moving from pharynx to trachea