∞ generated and posted on 2016.09.01 ∞

Animal possessing ectodermal and endodermal as well as mesodermal primary germ layers.

Triploblastic animals include all these except the sponges and the jellies (phyla Porifera and Cnidaria, respectively). In comparson to these other phyla, the triploblastic animals tend to be more sophisticated in both their behavior and movement.

Another name for triploblastic animals is the Bilateria, which reflects their typically bilaterally symmetrical body plans.

Triploblastic animals also can be distinguished into what are known as deuterostomes, on the one hand, and protostomes on the other.