Question

Name the passage in sequence through which urine passes from kidneys to the outside in humans. how is urine prevented from flowing back into the ureters ?

Answer 1

Kidney ->  the urinary bladder -> the urethra ----> outside [via vaginal opening in women or via the penis in man There are valves present in ureters called as ureterovesical valves which prevent the back flow of urine.

Answer 2

Here is your answer user.