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 reticular dermis accounts for the greater part of the dermis. On this level, the elastin and collagen fibres are multidirectional, whereas in the dermal papillae the elastin fibres are mainly oriented perpendicular to the skin surface.erves skin deep. Nerves include free nerve endings, that penetrate the epidermis a little or are linked to nervous corpuscles including the Meissner, Pacini and Ruffini corpuscles, which generate sensations coming from the skin-touch, temperature, or pressure.