Prostomium (sometimes also called acron) is the first body segment in annelids worms. It is in front of (but does not include) the mouth, being usually a small shelf- or lip-like extension over the dorsal side of the mouth. It sometimes bears antennae and eyes. By feeding, it often functions like a kind of overlip. The shape and composition of prostomium are important for annelid systematics.
http://en.wikipedia.org/wiki/Prostomium
The prostomium is the first body segment in an earthworm which is part of a group of worms called segmented worms or annelids. The prostomium does not include the worm's mouth. -Anonymous
The cast of Prostomium - 2010 includes: Luna Peters Killian Schlueter Nina Siebertz Katherina Wolter
The esophagus of an earthworm is part of the earthworm's digestive tract, between the pharynx and the crop, and it basically just moves the earthworm's food from the pharynx to the crop. It also helps to keep the food from backing up (making the worm barf/throw up).
Prostomium
Prostomium
The prostomium.
Near the crop of thr earth worm
There are about 30 segments between the prostomium and clitellum of an earthworm. actually this question asked as differently as "How many segments are between the prostomium and clitellum of an earthworm?" see answer for this question.
Prostomium is the frontmost part of the earthworm. This is not called a true segment as it doesn't contain typical organs of an annelida. Peristomium is from where the true segment of the earthworm body starts.
The lip-like sensory organ located above the mouth is known as the prostomium.
B prostomium for plato users
The lip-like sensory organ located above the mouth is known as the prostomium.