Does the absence of a digestive system indicate that tapeworms are primitive, ancestral forms of
Platyhelminthes?
Answers
Answer:
It is known that the tapeworm is not the ancestral form of platyhelminthes: instead it has lost its digestive tract due to its role as an intestinal parasite.
Answer:
Tapeworms don't have a digestive tract. All things considered, they retain their supplements from the stomach items in the host straightforwardly through their external surface, covering. New proglottids are continually framed in the neck of the worm and along the length of the tapeworm, they mature. Tapeworms go under Cestoda, a class of parasitic flatworms. They anchor to the host's gastrointestinal wall and acquire their food by retaining the supplements through its skin as the processed food in the digestive tract of the host streams over and around it. Flatworms are acoelomate, triploblastic creatures. They need circulatory and respiratory frameworks and a simple excretory framework. This stomach-related framework is deficient in many species. There are four conventional classes of flatworms, the generally free-living turbellarians, the ectoparasitic monogeneans, and the endoparasitic trematodes and cestodes. Trematodes have complex lifecycles including a molluscan optional host and an essential host in which sexual propagation happens. Cestodes, or tapeworms, contaminate the stomach-related frameworks of essential vertebrate hosts.
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