annelids (Earthworms)

Anatomy: The earthworm has a shape of a tube. The digestive system is within the tube. It also has a muscular,slimy and moist outer body.
Circulatory system: Earthworms have simple closed circulatory system. They have two main blood vessels which extend to the end of their body. A ventral blood vessel which leads to the posterior end, and a dorsal blood vessel which leads to the anterior end.
Reproduction: Earthworms are Hermaphrodites, they have two pair of testes, surrounded by two pairs of testes sacs. There are 2 or 4 pairs of seminal vesicles, which produce,store, and release the sperm via the male pores, and ovaries and ova pores that release female eggs via pores.
Digestion: The process of digestion in the earthworm begins by the mouth where food is sucked by the pharynx and then passed down through the esophagus where it is store in the crop. which retains food and has the ability to expand. Then it enters the intestine where the food is absorbed. After that the rest leaves the body through the anus.