Circulatory & Respiratory System

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Across
  1. 5. a muscular organ that pumps blood
  2. 6. the air sacs at the end of the bronchioles where the gas exchange takes place
  3. 8. connect arteries and veins
  4. 9. carries blood and nutrients away from the heart
  5. 10. carries blood and nutrients to the heart
Down
  1. 1. hollow tube that connects the larynx to the right and left bronchus
  2. 2. control the flow of blood by opening and closing
  3. 3. the two major air passageways leading from the trachea to the lungs
  4. 4. a flap of elastic cartilage attached to the larynx that closes when food passes
  5. 7. hollow muscular organ which holds the vocal cords