Bovine tapeworm causes disturbances in the functioning of the organs of the human body. How can you explain this?

Bovine tapeworm is of the type Flatworms. He completely switched to a parasitic lifestyle, so he lacks a digestive system, but the reproductive system is perfectly developed. The life cycle takes place with a change of owners. Moreover, the final owner is a person. Infection occurs through the meat of cattle. Therefore, it is necessary to carefully subject food to heat treatment. The chain causes great damage to the human body, as it feeds on it and releases harmful metabolic products.