With nearly 60% of it comprised of fat, which is our fattiest organ?
The fattiest organ in the human body is the brain, which is typically composed of 60% fat. The brain is composed of neurons and glial cells and is the largest part of the central nervous system. "Grey matter", which comprises 40% of the brain's weight, is pinkish-grey in color and contains 100 billion signal-transmitting neurons. "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.
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