Urethra

Definition

The urethra is a tube that connects the urinary bladder to the external body, allowing urine to be expelled from the body. In males, it also serves as a passageway for semen during ejaculation.

Related terms

Urinary bladder: A muscular sac in the pelvis that stores urine before it leaves the body through the urethra.

Kidney: An organ that filters blood to remove waste products and excess water, forming urine.

Sphincter muscles: Circular muscles that help control the expulsion of urine from the bladder through the urethra by opening and closing