PATHOLOGY

Detailed explanation-1: -The brain is composed of 40 percent gray matter, which is made of neurons, and 60 percent white matter, which is made of dendrites and axons that the neurons utilize. The two types of prominent brain cells are the glial cells and the neurons.

Detailed explanation-2: -Weighing about 3 pounds in the average adult, the brain is about 60% fat. The remaining 40% is a combination of water, protein, carbohydrates and salts. The brain itself is a not a muscle. It contains blood vessels and nerves, including neurons and glial cells.

Detailed explanation-3: -At age 20, the average weight of the male brain is approximately 1400 g, and by the age of 65 brain weight is approximately 1300 g. Brain weight for females follows a similar trend, although the total weight is 100–150 g less than that of males.