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urothelium
This term is a highly specialized medical and anatomical descriptor used primarily in histology and urology. It describes a specific type of transitional epithelium that is uniquely adapted to withstand the chemical toxicity of urine while remaining flexible enough to expand as the bladder fills.
Because it refers to a specific anatomical tissue layer, it is treated as an uncountable noun in most clinical contexts. It is rarely pluralized unless referring to different types or samples of the tissue across various species or experimental conditions.
Meanings
Examples
The urothelium acts as a critical barrier preventing urine from leaking into the bladder wall.
Look at this slide to see how the urothelium stretches when the bladder is full.
The biopsy showed a malignant transformation of the urothelium.
The biopsy showed a malignant transformation of the urothelium.
I wonder if the urothelium in the ureters differs significantly from that in the bladder.
Uroplakins are specialized proteins found on the surface of the urothelium.
The patient has a rare condition affecting the integrity of the urothelium.
We need to examine the urothelium for any signs of inflammation or hyperplasia.
We need to examine the urothelium for any signs of inflammation or hyperplasia.
The urothelium is uniquely adapted to withstand the toxicity of concentrated urine.