HUMAN BRAIN, brin
  • 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