国外精模板219.pptVIP

PowerPointTemplate /see161 Contents Hot Tip How do I incorporate my logo to a slide that will apply to all the other slides? On the [View] menu, point to [Master], and then click [Slide Master] or [Notes Master]. Change images to the one you like, then it will apply to all the other slides.  Diagram Cycle Diagram Diagram Diagram Diagram Diagram Diagram Diagram Diagram Diagram Diagram Diagram Block Diagram Table 3-D Pie Chart Block Diagram Click to edit company slogan . Man still has a lot to learn about the most powerful and complex part of his body -- the brain. In ancient times men did not think that the brain was the centre of mental activity. Aristotle the philosopher of ancient Greece thought that the mind was based in the heart. It was not until the 18th century that man realized that the whole of the brain was involved in the workings of the mind. During the 19th century scientists found that when certain parts of the brain were damaged men lost the ability to do certain things. And so, people thought that each part of the brain controlled a different activity. But modern research has found that this is not so. It is not easy to say exactly what each part of the brain does. In the past 50 years there has been a great increase in the amount of research being done on the brain. Chemists and biologists have found that the way the brain works is far more complicated that they had thought. In fact many people believe that we are only now really starting to learn the truth about how the human brain works. The more scientists find out, the more questions they are unable to answer. For instance, chemists have found that over 100,000 chemical reactions take place in the brain every second. Mathematicians who have tried to use computers to copy the way the brain works have found that even using the latest electronic equipment they would have to build a computer which weighed over 10,000 kilos. Some recent research also suggests that we remember every