The Brain Size

The human brains weighs about 1400 g and is estimated to contain around 100 billion neurons, each of which connects with around 10,000 others in branching networks.

A great deal has been said about brain size and its relationship to mental capacity and intelligence.

The brain has long undergone the process of evolution. The brain has not only increased in size, but also in its level of organization, sophistication and complexity.

However, the increase size of the brain, not necessarily an indication of increased intelligence.

The absolute size of the brain has very little meaning, since an elephant’s brain is obviously very much heavier than that of any other mammal.

However, as a general rule, the bigger the animal, the bigger the brain. Its look like that the bigger the body requires a larger brain to control the larger muscles.

For comparative studies, a more meaningful ,measure has been used in which brain weight is related to body weight.

However, there is currently no general agreement about whether relative brain size can be correlated with intelligence or mental ability.

The weight of an elephant’s brain is only 0.2 per cent of its body weight. It turns out that of all the mammals, the tree shrew, a small mouse like anima of nor great distinction or intellectual or otherwise - has the biggest relative brain size, 3 per cent of body weight.

The size of the brain is independent of the stature of the individual; that the size of the brain is also independent of sex, although since the tine of Aristotle, it has been the custom to repeat that the female brain is smaller than that of the male.
The Brain Size