gastrovascular cavity
gastrovascular cavity
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.
The free floating body form of cnidarians is called a medusa. Medusae have a bell-shaped body with tentacles hanging down, and they are often seen swimming in the water. Examples include jellyfish and hydromedusae.
A:True
No. Cnidarians do not have teeth or any hard body parts.
Ctenophores are gelatinous creatures with rows of cilia for movement and lack stinging cells, while cnidarians have stinging cells called cnidocytes. Ctenophores also have a simpler body structure compared to the more complex body plans of cnidarians, which include jellyfish, corals, and sea anemones.
That is not accurate. Cnidarians actually have a simple coelom called a gastrovascular cavity, which functions in digestion and circulation. Sponges, on the other hand, lack a true coelom and instead have a porous body filled with channels for water circulation.
like spokes on a wheel
cnidarians
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cnidarians
No. Cnidarians don't even have a circulatory system.