A mycorrhiza (Greek: Î¼ÏÎºÏÏ, mykÃ³s, fungus, and ÏÎ¯Î¶Î±, riza, root, pl. mycorrhizae or mycorrhizas) is a symbiotic association between a fungus and the roots of a vascular host plant. The term mycorrhiza refers to the role of the fungi in the plants' rhizosphere, its root system. Mycorrhizae play important roles in soil biology and soil chemistry.
The dermis consists of a papillary and a reticular layer which serve to protect and cushion the body from stress and strain. Differentiate among the regions of the dermis and the hypodermis. The dermis is divided into a papillary region and a reticular region.
The papillary dermis is the more superficial of the two, and lies just beneath the epidermal junction. It is relatively thin and is made up of loose connective tissue, which includes: The reticular dermis is the deeper and thicker layer of the dermis, which lies above the subcutaneous layer of the skin. 1  It contains dense connective tissue, which includes: 2  Blood vessels. 3  Elastic fibers (interlaced) 4  Collagen fibers (in parallel layers) 5  Fibroblasts. 6  Mast cells. 7  Nerve endings. 8  Lymphatics.