The human eye has three layers of eye tissue: the fibrous layer, the vascular layer, and the retina. Each of these layers performs a different function in helping a human see or in eye, as well as forms a place for muscles to attach to. The vascular layer protects portions of the eye. The fibrous layer of eye tissue allows light to enter the ourishes the eye and controls how much light comes into it. The retina is the section of the eye that allows a person to see. The fibrous layer has two distinct parts.
Noun. 1. alluvial soil-a fine-grained fertile soil deposited by water flowing over flood plains or in river beds. alluvial deposit, alluvial sediment, alluvium, alluvion-clay or silt or gravel carried by rushing streams and deposited where the stream slows down.. alluvial soil-a fine-grained fertile soil deposited by water flowing over flood plains or in river beds. alluvial deposit, alluvial sediment, alluvium, alluvion-clay or silt or gravel carried by rushing streams and deposited where the stream slows down.
Clay is the tiniest soil particle. Compared to sand particles, which are generally round, clay particles are thin, flat and covered with tiny plates. Clay particles tend to stick together and make very little movement through soil.umus-rich soils are naturally friable, clay soils are tight and almost impenetrable when dry and sandy soils are loose and coarse and need frequent watering to maintain plant growth. Each of these soils resulted from parent material and climatic effects. An ideal soil contains all three of these different soil types.