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Across 2. functional unit of the kidney 4. urinate 6. tube by which urine leaves the kidney 8. tube by which urine leaves the bladder 9. instrument used to obtain a sterile urine sample 12. constriction or narrowing 15. instrument for direct viewing of the bladder 16. excreting less than 500 ml of urine per day 17. inability to hold urine 18. pertaining to the kidneys 19. surgical excision of the bladder 20. tumor found on a mucosal surface

Down 1. excessive urination 3. chief nitrogen-containing waste product of protein metabolism 5. agent that causes increased urination 7. a toxic condition associated with renal failure 10. presence of ketones in the urine 11. crushing of a stone 13. enlargement of a kidney 14. surgical attachment of a prolapsed kidney