ANNELIDA
The annelida phylum consists of 17,000 species. They are segmented worms. 3 of them may sound familiar. These 3 are the ragworms, earthworms, and leeches. They are usually found in moist areas with alot of soil.
LEECH
Leeches are commonly seen and known as "bloodsucking pests". Well not all leech species drink blood for thier diet. Some species eat small insects, types of molluscs and other worms. They have an anus and a motuh. So their is opening for the food to come in and an opening for the food to come out.
EARTHWORMS
The digestive system of an earhtworm is seperated into different parts of the worm's segmented body with a different function for each one. The digestive system consists of the pharynx, esophagus, crop, and the intestine. Soil is the primary source of an earthworms diet. The soil enters the mouth and is swallowed by the pahrynx. The soil passes through the esophagus which has calciferous glands that help rid the worm's body of excess calcium. The food then moves into the crop where it is stored and then moved into the gizzard where the worm uses stones to grind the food down completely. The food moves into the intestine and fluids are released to aid in the digestive process. Blood vessels in the body of the earthworm help transport the absorbed digested food to the rest of the body. The earthworm also has an anal, where waste is expelled. This waste is our soil.
RAGWORMS
Ragworms choice of foods are either other worms or tiny sea animals. They produce eggs and mate so their digestive system is similar and different to those of the leech and earthworm. Ragworms have many segments depeiding on their size so the digestion process time, depends on whether how big the ragworm is or how small it is and what it eats. Otherwise, the ragworm digests its food like a normal annelida species.