Question

How our sphincter muscles control the flow of urine?

Answer 1

The urethral sphincters are two muscles used to control the exit of urine in the urinary bladder through the urethra. The two muscles are either the male or female external urethral sphincter and the internal urethral sphincter. ... It is a secondary sphincter to control the flow of urine through the urethra.

Answer 2

When either of these muscles contracts, the urethra is sealed shut. The external urethral sphrincter originates at the ishchiopubic ramus and insert into the intermeshing muscle fibres from the other side.

It is the secondary sphincter to control the flow of urine through the urethra.

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