What is a "vent"?

A vent is an anatomical feature commonly found in birds, reptiles, and some mammals, serving as an external opening for the reproductive, urinary, and digestive systems. Also known as the cloaca, the vent is a multi-purpose opening located at the posterior end of the body. In birds, it is the opening through which eggs are laid, waste products are eliminated, and mating occurs. The vent plays a vital role in excretion, allowing for the elimination of urine and feces from the body. Additionally, in some reptiles and mammals, such as monotremes, the vent serves as the opening for both the reproductive and excretory systems.