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 is also used for insulation, in particular the vermiculite that was mined by the Libby company in Montana for about 70 years, under the brand name Zonolite. Zonolite presents a health danger only because it was contaminated with tremolite, an asbestos-like mineral. Even though the majority of U.S. vermiculite attic insulation did come from the Libby mine, keep in mind that about 30% did not come from this source. Your Loose-Fill Insulation May Contain Asbestos If: Your house was built before 1990.