Noun
A nemertean worm of the former phylum Rhynchocoela
A tubular cavity, in such worms and other organisms, enclosing a proboscis
Source: en.wiktionary.orgA little above the gut is the rhynchocoel, a cavity which mostly runs above the midline and ends a little short of the rear of the body. Source: Internet
A very stretchy muscle in the back of the rhynchocoel pulls the proboscis in when an attack ends. Source: Internet
In most of the class Enopla ("armed" ), the proboscis exits from a common orifice of the rhynchocoel and mouth. Source: Internet
Proboscis and feeding The proboscis is an infolding of the body wall, and sits in the rhynchocoel when inactive. Source: Internet
The fluid in the rhynchocoel moves substances to and from the proboscis, and functions as a fluid skeleton in everting the proboscis and in burrowing. Source: Internet
The proboscis has a muscle which attaches to the back of the rhynchocoel, and which can stretch up to 30 times its inactive length and then retract the proboscis. Source: Internet