👉 Urts are a type of vertebrate, specifically an "urctine," which is a midline segment in mammals that connects the anus to the urethra. It's also called a "stool pouch" or "pouch of mucus." Urts are part of the digestive system and help with waste removal. They're connected to the anus through a small opening known as the anal canal, which is where most of the food goes.