Psychology is the scientific study of the mind and behavior. Psychology is a multifaceted discipline and includes many sub-fields of study such areas as human development, sports, health, clinical, social behavior and cognitive processes.
Psychology is really a very new science, with most advances happening over the past 150 years or so. However, its origins can be traced back to ancient Greece, 400 – 500 years BC. The emphasis was a philosophical one, with great thinkers such as Socrates influencing Plato, who in turn influenced Aristotle.
Philosophers used to discuss many topics now studied by modern psychology, such as memory, free will, attraction etc.
In the early days of psychology there were two dominant theoretical perspectives. An American psychologist named William James (1842-1910) developed an approach which came to be known as functionalism. He argued that the mind is constantly changing and it is pointless to look for the building blocks of experience.
The first division of the alimentary tract is formed by the mouth.
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greatest, largest.
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It extends from the oral cavity to the anus. It consists of the mouth, pharynx, esophagus, stomach, small intestine, and large intestine.