(You will need to register / login for access)Ĭomments below may relate to previous holders of this record. For a full list of record titles, please use our Record Application Search. "White matter", accounting for 60% of the weight, connects the grey matter together, carrying the nerve impulses between neurons, as well as providing nutrition and support the name comes from layers of a white lipid-rich (fatty) substance called myelin that protects and insulates the nerve cell axons.Īll records listed on our website are current and up-to-date. The central nervous system is better protected than any other system or organ in the body. "Grey matter", which comprises 40% of the brain's weight, is pinkish-grey in colour (owing to the blood surging through it) and contains 100 billion signal-transmitting neurons. It consists of two parts: the brain and the spinal cord. The following information provides a brief description of some of the major parts of the human brain. Years of scientific study have made it possible for scientists to identify the various areas of the brain and determine their specific functions. The brain is composed of neurons and glial cells and is the largest part of the central nervous system. In order to be medically able to become an organ donor, an individual must pass away on a ventilator in a hospital. While the brain only weighs about three pounds, it is a highly complex organ made up of many parts. 77% of the brain, with lipids (fats) accounting for 10–12%. The fattiest organ in the human body is the brain, which is typically composed of 60% fat.
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