Which of these animals have a digestive system?? Plzzzz help me out?Cnidaria, Ctenophora, platyheminthes, Rotifera, Nematoda (round worms), Brachiopoda, Mollusks (clams, snails), Arthropods (insects, spiders, crustaceans), Echinoderms and chordates.
AND PLZzzzzzzz tell me if you are sure about the correctness of the information u give or not Thank you sooooo much
Posted by Jessie
nematoda were the first to have a COMPLETE digestive system meaning they were the first in the evolutionary line to have a mouth and anus. Although a lot of these like mollusks and arthropods and echinoderms and probably others but I'm not sure have complete digestive tracts. Cnidarians have a digestive system though although it's not complete, they just have a mouth. And they were the first animals in the evolutionary line to have a mouth because before them were sponges and sponges filter feed.
Posted by xylocopa, fair and balanced
All of them.
Orignal From: Which of these animals have a digestive system?? Plzzzz help me out?
Post a Comment