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The ureters link the kidneys to the urinary bladder. The wall of the ureter consists of, from inside to outside, urinary epithelium (transitional epithelium or urothelium), a fibrous lamina propria, a muscularis consisting of inner circular and outer longitudinal smooth muscle layers, and an adventitia of loose connective tissue and adipose cells. The ureter has a folded mucosa.
The micrographs depict the ureter of a male mouse. The 4X micrograph is an overview of the ureter, urethra, and prostate. The 10X and 20X micrographs depict the ureter in increasing detail, including the adipose tissue surrounding the ureter and the adjacent large blood vessels. Details of the ureter’s urinary epithelium and inner circular and outer longitudinal muscularis are presented in the 40X micrograph.
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