Body shapes of cidarians is alike in being radially symmetrical . All are vase like and possess tentacles . Digestive system is sac like wit only one opening mouth .
umbrella
You have described body plan of a medusa...... and a jellyfish is a good example of a medusa.
Nematoda- psuedocoelomates
No, polyps are the anchored versions, anemones and hydras and such. The umbrella is called a medusa, or jellyfish.
It has a single layer of cell. Lay a paper on a flat surface. With your hands on the surface, push two sides together until you make something that looks like a polyp. Voila! Something similar to a crosssection of a sponge. Think of the paper as cells in a single line.
Ostia
No. A sponge is asymmetrical, because it lacks any organised body plan. Animals with radial body symmetry display a regular arrangement of body parts around a central axis, usually in a circular pattern. jellyfish, for example, have radial body symmetry.
the body plan
radial smmatree
a cheetah body plan is to catch it's pray.....
angazi
The cemeteries were similar to a small town plan