👉 Micturition is a bodily function that involves the involuntary expulsion of urine from the body. It occurs when the bladder fills with urine and the urethra (the tube in which urine passes) opens to allow the urine to flow out through the urethral sphincter. Micturition is an essential process for proper kidney function, as it helps regulate the amount of waste that is produced by the body. The term "micturition" can also be used as a