What physical adaptations (changes) were necessary for flatworms to become parasitic?

Question

What adaptations did flatworms need to gain before they could be parasites?

Thanks =)

Answer 1

A parasitic flatworm has less-evolved digestive system, since they absorb the nutriens directly from the host, having no point to digest further.

They also have more complex reproductive life cycle, where they lay eggs that will be put in the f***s. Then a food will be contaminated with eggs, new flatworms will develop to other hosts.

Also, parasitic flatworms will usually have hooks on the scolex (anterior region) to attach it to the wall of the gut, and they have an extra outer covering (glycocalyx) to protect it from being digested.

Hope I helped a lot! :D

Answer 2

I think they already are paracytes..I think alot of fat people would be better if they had a few flatworms in their intestines, to share their food!

instead of excess food being turned into fat, it would be turned into flatworm