Distinguish between the followings(a) Prostomium and peristomium(b) Septal nephridium and pharyngeal nephridium

Question

Philoid · Accepted Answer

Prostomium	Peristomium
1.Prostomium is a lobe, which covers the mouth at the anterior end.	1.Peristomium is the first body segment.
2.Prostomium has a wedge to force open cracks in the soil.3.It is sensory in function.	2.The mouth is present in the peristomium.3.It is commonly called as buccal segment.
Septal nephridium	Pharyngeal nephridium
These are present on either side of the inter-segmental septa from segments 15^th to the last. They open into the intestine.	These are present as paired tufts.They are present in the 4^th ,5^th , and 6^th segement.