Question

Why do nematodes need pseudocoeloms??

Answer 1

they need it bcz first it evolutionary which becomes true corn coelomnin higher class of organism second it's helps in mesodermal cavity function related to that

Answer 2

Nematodes do not have completely developed mesodermal lining cavities called coelom. They have cavities that are not formed completely by mesoderm. Thus they are not true coelom and are known as pseudocoelom.