Cestode is a large three-layered helminth. In the process of evolutionary development, in the process of its individual development it lost the digestive system (Fig.), as well as respiratory organs and intermediate hosts. Sexual and asexual reproduction occurs only directly in the external environment. The head reaches a length of 1 cm. There is no mouth opening, food is absorbed through the entire surface of the body.
Tapeworms parasitize the intestines of humans and animals. The presence of various representatives of the tapeworm family in the human body often leads to serious consequences. They can reach monstrous sizes, disrupt the functions of the digestive system,