Lecture Two: The nervous system 1. Definition: The nervous system is a very complex system in the body. It has many parts. It is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. The nervous system is divided into two main systems, the central nervous system (CNS) and the peripheral nervous system (PNS). The Nervous system has three main functions: - Sensation : it receives the information from the environment and from inside of the body. - Integration : it interprets and processes the information (the impulse) it receives to determine the appropriate response. -Reaction : It makes the body responds to the information. 1.1. The Central nervous system: The central nervous system is divided into two parts: the brain and the spinal cord . The average adult human brain weighs 1.3 to 1.4 kg (approximately 3 pounds). The brain contains about 100 billion nerve cells (neurons) and trillions ...
Neuroscience is the study of human brain, its structure, functions, and revolutionary history... this blog is made for third year colledge students SLD OPTION in order to review the most important things they have seen during lectures of neuroscience.
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