differentiate between flat worms and round worms
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Answer:
Flatworms
They do not have a body cavity and thus are acoelomates.
They have a thin, dorsoventrally flattened body, so called flatworms.
They have an incomplete alimentary canal.
They are mostly hermaphrodites.
The excretion and osmoregulation in flatworms occurs by flame cells or solenocytes or protonephridia.
Roundworms
They are pseudocoelomates i.e. they have a body cavity between their mesoderm and endoderm layers.
They have a long cylindrical body, vermiform, unsegmented with no lateral appendages.
These are the first animals to have a complete and straight alimentary canal. Intestine is non-muscular and they have a tube within a tube plan.
These are ammonotelic in nature and their excretory system is H-shaped and intracellular called a Rennett cell.
They are dioecious or unisexual and always show sexual dimorphism.
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