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