Cnidarians.
Reptiles have 2 body openings. Mouth and an anus.
Poriferans needs organic substances and cnidarians needs of a gastrovascular cavity with openings.
The body systems that cnidarians have take two forms. The main body forms are medusa and polyp. Cnidarians do not have a transport system and the body surface is used for gaseous exchange.
7
2
4
12
2
No. Cnidarians do not have teeth or any hard body parts.
like spokes on a wheel
Ostium.