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Urothelium (or uroepithelium) is an example of transitional epithelium. It is the type of epithelium that lines much of the urinary tract including the renal pelvis, the ureters, the bladder, and parts of the urethra.
From Wikipedia, the free encyclopedia. Not to be confused with Enterochromaffin-like cell. Enterochromaffin (EC) cells, or  Kulchitsky cells , are a type of enteroendocrine and neuroendocrine cell occurring in the epithelia lining the lumen of the digestive tract and the respiratory tract that release serotonin.