Disposing the Waste
Function:
The urethra allows urine to pass outside the body. When your brain signals the bladder muscles to tighten, it squeezes urine out of the bladder. At the same time, your brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra. When all the signals occur in the correct order, normal urination occurs.
Fun Fact:
Male and female urethras are different. The female urethra is only about 1.5 inches long, while male urethras are 7 to 8 inches long.
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