Endoskeleton three phyla and one subclass of animals, endoskeletons of various complexity are found: Chordata, Echinodermata, Porifera, and Coleoidea. An endoskeleton may function purely for support (as in the case of sponges), but often serves as an attachment site for muscle and a mechanism for transmitting muscular forces. A true endoskeleton is derived from mesodermal tissue. Such a skeleton is present in echinoderms and chordates. The poriferan 'skeleton' consists of microscopic calcareous or siliceous spicules or a spongin network. The Coleoidae do not have a true endoskeleton in the evolutionary sense; there, a mollusk exoskeleton evolved into several sorts of internal
Phyla-Vell the three heroes and Annihilus as survivors. Ultimately in the battle, Phyla manages to steal away the quantum bands that Annihilus took from Quasar, weakening him and allowing Nova to finally bring an end to the Annihilation Wave. She is then seen re-united with Moondragon, and deciding it's up to her to become the new Quasar. Phyla had her own mini-series as the new Quasar, stating July through October 2007, called " – Quasar". The series was written by Christos Gage (who wrote "Union Jack"), penciled by Mike Lilly. Phyla is finding it hard to follow the footsteps of the