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
Subgroups of Amish of salvation or practices like community of goods that are normally not accepted among mainstream Amish. These groups are composed of members from different backgrounds, mostly Amish, Old Order Mennonite, Old German Baptist as well as people from non-plain churches, so-called seekers. The following are groups (past and present) described as "para-Amish" by Waldrep: Waldrep describes a pattern across these movements that when families that made up a group dispersed, they typically rejoined the Amish, the Charity Movement, other assimilated Anabaptist churches, or one of the other para-Amish groups. Subgroups of Amish Subgroups of Amish developed over the years, as