What is a gastrovascular cavity and how does it differ from a complete digestive tract?
well if you mean the gastrovascular cavity...then they are different... in a gastrovascular cavity the main difference from a digestive tract is that the anus is the mouth (it is where things go in and out) while a digestive tract has a tube that on opposite ends are the mouth and anus.
The gastrovascular cavity is a structure found in primitive animal phyla. It is responsible for both the digestion of food and the transport of nutrients throughout the body. The cavity has only one opening to the environment. Food goes in and waste comes out that same opening, making it a two-way digestive tract.