Question

2 difference between prostomium and peristomium

Answer 1

Prostomium1.Prostomium is a small fleshy lobe, which overhangs the mouth of an earthworm.2.It helps the organism push into the soil and is sensory in function.Peristomium
1.The first body segment in the earthworm is called the peristomium.2.It surrounds the mouth opening.

Answer 2

Prostomium: Prostomium refers to a portion of the head of the annelids, which is situated in front of the mouth. 

Peristomium: Peristomium refers to the front segment of annelids, which surrounds the mouth.


Prostomium: Prostomium is the head portion of the annelid’s body.

Peristomium: Peristomium is the first segment of the annelid’s body.


Prostomium: Prostomium is an older segment of the annelids body.

Peristomium: Peristomium is the oldest segment of the body.