Brain
Brain lies in the cranium of skull. The human brain has wrinkled surface and appears as a large, soggy, pinkish grey walnut. Adult brain, on average, weights two per cent of their body weight, growing from the quarter of its size at the time of birth. the reaches between 75 and 80 percent of adult size at the size of 6 years. Human brain composed of about 30 billion neurons. It weights about 15- 17% of cardiac output. It also receives about 20% of the oxygen consumed by the body. The left hemisphere of the brain controls the right side of the body and vice-versa. Regions of the brain: Fore-brain: It consist of three parts Olfactory lobe, Cerebrum, Hypothalamus The cerebrum is the largest part of the human brain. the cerebral cortex is roughly 80% of total brain mass. the Cerebrum is the most complex and specialized part of the brain. It consists of two cerebral hemispheres. The cerebr...