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ureters:
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each ureter is a long tube that transports urine from the renal pelvis to the urinary bladder
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the wall of the ureter is composed of three layers:
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adventitiamuscularismucosa
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adventitia of ureter:
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anchors ureteres to surrounding tissues
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muscularis:
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is composed of 2 layers of smooth muscle
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contractions of muscularis initiate:
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peristalsis to move urine thru ureter toward urinary bladder
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mucosa:
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has transitional epithelium and underlying lamina propia that contains collagen and elastic...
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mucus is secreted to:
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protect ureter from urine acidity
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urinary bladder
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hollow, muscular organ on the floor of the pelvic cavity posterior to the pubic bone
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trigone:
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a small triangular area on the floor of the bladder bounded by openings of ureters and urethra
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the wall of the urinary bladder consists of 3 layers:
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fibrous adventitiadetrusor musclemucosa
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fibrous adventitia or urinary bladder:
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anchors urinary bladder to surrounding tissues
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detrusor muscle of urinary bladder:
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have 3 layers of smooth muscle that form internal urethral sphincter at base of bladder
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mucosa of urinary bladder:
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has transitional epithelium
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when bladder is relaxed:
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mucosa exhibit rugae
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urethra:
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small tube leading from the floor of the bladder to the outside of the body
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