The annelids are a large phylum for the organisms ringed worms. This phylum holds all of the common segmented worms such as earthworms, ragworms, and leeches. These species are able to survive in all different enviroments. Some species adopted to fresh water while others adopted to moist terrestrial environments.
Annelids Digestive System
The Annelids digestive system goes form the mouth to the anus like other phylums. The muscles connected to the pharynx is connected to the body of the organism. In this pharynx we have the esophagus. Like other animals the organism uses many organs to work its digestive system such as the esophagus, gizzard, and intestines.
Earthworm Digestive System
Ragworms Digestive System
In this diagram, it demonstrates the ragworm's digestive system. In the middle of the body, you have the coelom. The coelom is the bodies cavity in metazoans. This is located between the intestinal canal and the body wall. The capillary network is a vessel for the blood to flow through. The collecting tubule is located in the ragworm's kidney, this is where the food goes through the process of digesting. The bladder is a membranous organ which urine is transferred to. of course the external opening is where all of the waste is disposed.
Leeches Digestive System
The leeches digestive system are the same as the other organisms in its phylum but because its body is quite different, they way their digestive system is set up can be seen as different. Unlike the other animals, the leech has a jaw. The jaw is located on the anterior side of the body. Once the food goes in through the jaw then the digestive system like the other organisms in the phylum.