Clam Worm-Allita Succinea
The clam worm, is one of the rarest marine worms. They are located mostly in moderate temperature oceans, and have a very similar digestive system to most worms. Just like the earthworm, it has an unsegmented gut traveling throughout its body. It starts of by traveling from the mouth to the pharynx; a section of the digestive system in which the food is coated in a slimy coat, making the food be able to travel through the body faster and smoother. The next part, contains a section called the esophagus, in which the slimy food is combined with calcium carbonate. This is done to balance out the acid within the food so the worm isn't effected by the negative affects of the acid. The third part in the digestive system is the crop, which is a temporary food storage for the worm. The fourth part is the gizzard, where the food is churned inside it's body. This is done because the earthworm doesn't have teeth to do it for them, so muscles within the worm crush the food for the worm. The final part of the digestive system of an earthworm, is called the intestine. Inside the intestine, there a "friendly bacteria" where the bacteria absorb the food in the gizzard, and get rid of unneeded nutrients called waste. The bacteria is then absorbed by the worm, feeding it and keeping it alive. The waste is then deposited in the anus, which then produces feces.