- Brain is the master control centre of the body.
- A newborn baby s brain weighs less than 0.5 kilogram. By the time a person is 6year old, the brain has reached its full weight of about 1.4 kg.
- The human brain makes up only about 2 per cent of the total body weight, but it uses about 20% of the oxygen used by the entire body when at rest.
- Scientists in various fields work together to study the brain. This field of study, called neuroscience or neurobiology, is rapidly increasing our understanding of the brain.
- The brain has three main divisions :( 1) the cerebrum, (2) the cerebellum. And (3) the brain stem Each part consists chiefly of nerve cells, called neurons , and supporting cells, called gila
- The cerebrum makes up about 85 per cent of the weight of the human brain.
- The cerebellum is the part of the brain most responsible for balance, posture, and the coordination of movement. It lies below the back part of the cerebrum.
- Positron Emission Tomography (PET) and Functional Magnetic Resonance Imaging (FMRI) are safe new technologies that enable scientists to study healthy, living brains at work.
- Brain cells begin to die if they are deprived of oxygen for three to minutes.
- Cerebrum is the part of the brain responsible for thought, imagination, memory, awareness of vision, hearing smell, taste, touch heat etc.
- Medulla oblongata controls heart beat, breathing contraction of blood vessels, vomiting, sneezing coughing etc.
- Hypothalamus maintains homeostasis by regulating the body temperature, water level etc .It controls the secretion of Pituitary hormones.
- Cerebrum is the largest part in brain
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