I'll choke you till it protrudes from your mouth, and then I'll cut it off!
It is this membrane which protrudes like a blister from the tissues.
(It is wide and protrudes, so that it is like a large bench).
The long neck which protrudes from the shell has to be discarded.
On each side of the mouth is a short tentacle which protrudes from a sac.
Earthworms have no teeth, ...