Schistosoma is a parasite found in:

Acoelomate animals with flame cells are:

Consider the following characters $:-$
$1.$ Bilateral symmetry
$2.$ Acoelomate
$3.$ Incomplete digestive system
$4.$ Mostly endoparasites
Select the correct group of phylum with its corresponding animal for the above-given characters $:-$

The study of worms which cause parasitic infestations in humans is called:

In Platyhelminthes and rotifers,the excretory organs are . . . . . . .

Platyhelminthes are $......$