Circulatory and Respiratory System

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Across
  1. 2. An organ that helps pump blood to the body
  2. 5. The second sound of the heartbeat
  3. 6. An organ that helps us breath
  4. 7. The smallest blood vessels, where the exchange of oxygen occurs in the lungs
  5. 9. Main Function: To supply the blood with oxygen and remove carbon dioxide from the blood as you inhale and exhale
  6. 10. Contains vocal cords that vibrate to make sound
Down
  1. 1. Function: Transports food and oxygen to cells and picks up waste in all parts of the body
  2. 3. Our heart is ____ chambered
  3. 4. Flap of tissue that prevents the backflow of blood
  4. 8. Occurs when the blood supply to the brain is blocked causing brain cells to die