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Across 4. a microorganism that causes disease 5. the clear fluid that fills the spaces around body cells 11. a disease that progressively destroys the walls of alveoli 12. small vessels that carry blood from arterioles and to small vessels called venules, which empy into veins 13. secretions from the stomach lining that contain hydrochloric acid and pepsin 17. a yellow-green bitter fluid important in the breakdown and absorption of fats 20. the main airways that reach into each lung 22. inflammation of the urethra 23. tubes that connect the kidneys to the bladder 24. the fluid in which other parts of the blood are suspended

Down 1. a sore in the lining of the digestive tract 2. a measure of the amount of force that the blood places on teh walls of blood vessels as it is pumped through the body 3. the oxygen carrying protein in blood 4. types of cells in the blood that cause blood clots to form 6. a series of involuntary muscle contractions that moves food through the digestive tract 7. a contagious bacterial infection that usually affects the lungs 8. inflammation of the bladder 9. a technique in which an artificial kidney machine removes waste products from the blood 10. the process of chewing 14. inflammation of the appendix 15. the tube that leads from the bladder to the outside of the body 16. a muscle that separates the chest from the abdominal cavity 18. the functional units of the kidneys 19. the windpipe 21. an inflammatory condition in which the trachea, bronchi, and bronchioles become narrowed, causing difficulty breathing