Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of wholly animals. Cholesterol is also considered a sterol (a combination steroid and spirits of wine). Because cholesterol is synthesized by entirely eukaryotes, track amounts of cholesterol are also found in membranes of plants cholesterol and fungi. The name originates from the Greek chole- (bile) and stereos (sound), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in rich form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the come to terms 'cholesterine'. Most of the cholesterol in the body is synthesized by the body and some has dietary origin. is more thick in tissues that either synthesize more or be in possession of more abundant densely-packed membranes, because example, the liver, spinal small rope and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory plan bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver, respectively.