What type of body plan is shown by ctenophores and nematodes?

Question

shrutipande9 · Answer

nematodes have simple body plan which is tube within tube and are called as pseudocoels because they do not have a true ceolom.
ctenophores have blind sac body plan.

goformit100 · Answer

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anonymous · Answer

A tube within tube is one which the body has two openings, right? Ctenophores also have two openings, then why don't they have a tube within tube type of body plan?

shrutipande9 · Answer

yes tube within tube is the one with two openings.

shrutipande9 · Answer

see earlier ctenophores were considered in coelentrata(cnidaria) because they are very similar to the cnidarians. i tried to search but i always got the body plan as blind sac.

anonymous · Answer

Yeah, I got the same result when I googled it...