ANATOMY

Detailed explanation-1: -The human brain weighs approximately about 1.4 kilograms and makes up about 2% of the human body weight.

Detailed explanation-2: -Aging Brain 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.

Detailed explanation-3: -The average adult male weighs about 1370 grams, whereas the average brain weight of females is 1200 grams. Males’ brain weight falls by 2.7 grams and that of females’ falls by 2.2 grams annually as they age. Independent of sex, brain weight rises by an average of 3.7 gm for each centimeter of body height.

Detailed explanation-4: -A newborn baby’s brain weighs about 400 grams – a bit lighter than half a litre of milk, or about the same as four medium-sized rainbow lorikeets. By the time that baby reaches her teens, her brain now weighs about 1.4-1.5 kilograms: one whole extra litre of milk or a whopping nine or 10 extra lorikeets!