Graci Hart/Mrs.Key

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Across
  1. 1. a little cavity,pit,or cell as a cell of a honeycomb
  2. 5. Either of the two main branches of the trachea
  3. 7. Of relating to,or affecting the heart and blood vessels
  4. 8. The tube or cavity,with its surrounding membrane and muscles
  5. 9. The fluid that circulates in the principal vascular system
  6. 11. node any of glandlike masses of tissue in the lymphatic vessels
  7. 12. a blood vessels that conveys blood from the heart to any part of the body
Down
  1. 2. The system by which lymph is returned from the cells to the blood
  2. 3. One of the system of branching vessels or tubes conveying blood from verious parts of the blood to the heart
  3. 4. the tube in humans and other air-breathing vertebrates extending
  4. 6. the system by which oxygen is taken into the body and the exchange
  5. 7. Pertaining to or as if in a tube of a fine bore
  6. 10. a muscular and cartilaginous structure lined with mucous