True tissue. Tapeworms are different. Repeated segments of reproductive organs. flukes (i,e, flatworms): gastrovascular cavity (brings food in, digests, vascular cavity), many are hermaphrodites although not all, so mostly sexual reproduction. Some centralization of nervous system. Ganglion, FROM HERE ON OUT YOU WILL SEE CENTRALIZATION OF NERVOUS SYSTEM, Remember the infectious ones we discussed.). Cats and dogs fleas, pork, cow tapeworms. Remember for the nematodes as well. Hookworms.