what are the circulations of a jelly fish?

Answer 1

The jellyfish has a gastrovascular cavity in which food, water and oxygen enter due to the motion of the jellyfish's mantle.

As the water enters with the oxygen, it deposits the oxygen into the tissues and picks up the carbon dioxide. The water and the carbon dioxide exit the body through the mouth/anus opening.

After the food enters the gastrovascular cavity, it is slowy digested into feces and monomers. The feces are then expelled through the mouth/anus opening along with the water and the carbon dioxide. The monomers are absorbed by the body tissues. Cavity is multiply-branched and so virtually all cells are near one of the branches. Not a true circulatory system - no blood or blood vessels.

Answer 2

I think Mantra pretty much summed it up if you are looking for oxygen/fluid flow.

If you are looking for how do they move or know where they are going? Most Jelly fish use currents but some do swim. Some do not swim at all and remain upside down on the bottom of the ocean. Like an anemone waiting for food.

Some the the Man o War are actually two different creatures living together. Once being the gasious balloon and the other a stinging invert.

Answer 3

The main circulation inside a jellyfish (more correctly called a sea jelly, because they're not a fish!) are of food, water, and wastes. Everything has to go in and out through the same opening - there's no separate mouth and anus.

The jellies have no brain or nervous system, but the lining of their central cavity is lined with cilia which are like little hairs, but they can move. The cilia move together to create a current inside the jelly to bring food in, move it around so it can be digested, then move the wastes back out.

Oxygen is absorbed from the water through the skin.

This website has some more information and a video where you can see how this works for yourself: http://intro.bio.umb.edu/111-112/112s99Lect/bodyplans/jellyfish.html

Monomers, mentioned in the first answer and the website directly above and single units of a food item, in case you don't know what these are. For example, a carbohydrate is a chain of sugar molecules, so a monomer here would be just one molecule of sugar. For a protein, a monomer would be an amino acid (proteins are chains of different types of amino acids).