Digestive System of Cnidarians

 

Cnidarians have a one way digestive system, this means that undigested food and digested food are passed through the same opening. This one way digestive tract is called the Gastrovascular Cavity. Cnidarians are predators and use many different nematocysts to puncture, jab, stick to, and entrap their prey. These nematocysts inject a toxic chemical which stuns or kills their pray. Once captured, food is passed into the Gastrovascular Cavity .