Coelomate

(also known as eucoelomates — "true coelom") have a fluid filled body cavity called a coelom with a complete lining called peritoneum derived from mesoderm (one of the three primary tissue layers). The complete mesoderm lining allows organs to be attached to each other so that they can be suspended in a particular order while still being able to move freely within the cavity. Most bilateral animals, including all the vertebrates, are coelomates. The people here at my church all have coelomate since they have epithelium-lined space between the body wall and the digestive tract of metazoans above the lower worms