Pharynx and intestine

@article{Tzetlin2004PharynxAI,
  title={Pharynx and intestine},
  author={Alexander B. Tzetlin and G{\"u}nter Purschke},
  journal={Hydrobiologia},
  year={2004},
  volume={535},
  pages={199-225}
}
The alimentary canal of polychaetes consists of a foregut, midgut, and hindgut. The alimentary canal shows different specializations even in homonomously segmented polychaetes. The foregut gives rise to the buccal cavity, pharnyx and oesophagus, the midgut may be divided into a stomach and the intestine proper. Since polychaetes use a wide spectrum of food sources, structures involved in feeding vary as well and show numerous specializations. In the foregut these specializations may be… CONTINUE READING
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