definition of parazoa and enterozoa

Parazoa- ​Parazoa is an ancestral subkingdom of animals ​that do not possess tissues or organs. ​The only surviving parazoans today are the sponges, which now belong to the phylum Porifera, and the Trichoplax belonging to the phylum Placozoa. 
Enterozoa- ​An enterozoa is an animal parasite that lives in the intestines. For example, tapeworm and hookworm.