Biology, 03.05.2021 04:30, reneebrown017

Question 11 (1 point) What prevents backflow of urine into the kidneys? O the internal urethral sphincter
the angle of the ureter
the external urethral sphincter
the mitral valve

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Question 11 (1 point) What prevents backflow of urine into the kidneys? O the internal urethral sp...