Transitional Epithelium

This type of epithelium resembles both stratified squamous and stratified cuboidal as the surface layer could change shape.  They are usually found in the urinary tract such as the ureters, urinary bladder and urethra where the organs and tubes need to be stretched to accommodate extra volume.

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Transitional epithelium.  (TM: 400x, picture taken with a Zeiss Planapo 40/1.0 Oil on Sony A7ii)
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Distended urinary bladder.  (TM: 400x, picture taken with a Zeiss Planapo 40/1.0 Oil on Sony A7ii)
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Transitional epithelium along the lumen of the ureter, x.s.  (TM: 630x, picture taken with a Zeiss Planapo 63/1.4 Oil on Sony A7ii)
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Monkey bladder (TM: 100x, picture taken with a Nikon Plan Apo 10/0.4 on Sony A7ii)
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Transitional epithelium of Monkey bladder.  Notice the uppermost layer of cells are cuboidal in shape.  (TM: 630x, picture taken with a Zeiss Planapo 63/1.4 on Sony A7ii)

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