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Circulation within Cnideria isn't 'realy' circulation. They do not have any organs or special tissues that work for circulation. Organisms in this phyla would get their nutrients through diffusion. Since these organisims are never far away from water they just get their nutrients through the water that they are in.
What else can I help you with?
What are three function of a cnidarians' gastrovascular cavity?
1. digestion 2. circulation 3. physical support and movement
Having a true coelom distinquishes cnidarians from sponges?
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.
In what way is a portal circulation a strange circulation?
The portal circulation is a "strange" circulation because it consists of veins draining into capillaries, which drain into veins again.
How do cnidarians eat?
Mainly through suspension feeding. Cnidarians use stinging tentacles (nomocytes) to capture their prey. Once the tentacles grab the food it is absorbed in the gastrovascular cavity (stomach) and taken in asnutrients.
What are two types of cnidarians that are formed by colonies?
small cnidarians and big cnidarians
What is the family for cnidarians?
The cnidarians are in the Kindom family
Do cnidarians have nerves?
cnidarians have no nervous system
Is a cnidarians invertebrates?
Yes, cnidarians are invertebrates.
Are earthworms cnidarians?
Nope - Cnidarians are marine creatures !
What is a Cnidarians such as a box jellyfish?
cnidaria(similar to cnidarians)
How do cnidarians reproduce.?
Cnidarians reproduce asexually and sexually
Difference between cnidarians and corals?
There is none. Corals are cnidarians.
