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Which of the following prevents the backflow of urine?

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in Biology – Class 11 by (272k points)
Which of the following prevents the backflow of urine?

(a) Valves

(b) Muscles

(c) Urinary sphincter

(d) Oblique opening of ureters

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Question is from Human Excretory System in chapter Excretory Products and Elimination of Biology – Class 11

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The correct answer is (d) Oblique opening of ureters

For explanation I would say: Both the ureters that emerge out of the kidneys, open through separate oblique openings into the urinary bladder. The oblique openings of these ureters prevent the backflow of urine.

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