The brain is the central unit of the human body. Although located in the head, the brain controls many functions of the human body. The human brain is the most developed of all mammals. Though studies are still being carried out to know more about the brain, there are some proven facts. These are some awesome things you probably do not know about your brain. For its enormous functions, the brain is surprisingly small. For an average adult weighing about 75kg, the brain would weigh about 1.5kg. That’s just 2% of the total body weight. Click the next ARROW to see the next photo!