Long direct quotations in MLA format. Long direct quotations consists of quotations that are longer than four lines of prose or three lines of verse, and the MLA format dictates how these are presented. 1  Use a free-standing block of text (block quote). 2  Omit the quotation marks. 3  Start the direct quotation on a new line. 4  Indent one inch from the left margin. 5  Indent the first word of 6  ... U
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 Cnidaria's digestive system is very complex but also simple. They have a one way digestive system. On way meaning that all of food ( digested or not ) go through the same way. This process is called the Gastrovascular Cavity. Every animal has their way of surviving this forever changing world. Some animals do the hunting while others get hunted. Fortunately the Cnidaria's are the hunters in this situation.