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 loosens compact soils and helps hold water and nutrients. Vermiculite is one of the three ingredients in the Square Foot Gardening method by Mel Bartholomew. This soil additive is formed by heating particles of mica, a natural ore.The heat causes Mica to expand, which makes it extremely porous.The advantage of Vermiculite is in its ability to hold nutrients, boost soil moisture, and aerate the soil.he heat causes Mica to expand, which makes it extremely porous. The advantage of Vermiculite is in its ability to hold nutrients, boost soil moisture, and aerate the soil.