Dense irregular connective tissue. Dense irregular connective tissue has fibers that are not arranged in parallel bundles as in dense regular connective tissue. Substances formed[edit] This tissue comprises a large portion of the dermis. This type of tissue is also in the protective white layer of the eyeball and in the deeper skin layers.
Definition of VERMICULITE. : any of various micaceous minerals that are hydrous silicates resulting usually from expansion of the granules of mica at high temperatures to give a lightweight highly water-absorbent material.
Vermiculite mined at a plant in Libby, Mont., once the main source of the material, was found to be contaminated with asbestos fibers. Though the plant was closed and the industry reformed, people have, to some degree, made the switch to perlite. Perlite is made from a mined volcanic glass of the same name.