A signal can pass through a nerve cell with a speed of 265 miles/hour. Groups of nerve cells get together to form the nerve tissue or nerves. Neurons or nerve cells carry signals throughout the nervous system. For example, whenever we think about raising our hand or kicking a football the SNS sends signals from the brain to our muscles telling them what to do. On the other hand, the SNS is involved with the conscious control of the body. For example, the ANS controls our breathing, heart beat, blinking, and the digestion of food. That is the ANS controls all the body functions that takes place without us thinking about it. The ANS is involved with the unconscious control of body parts.
The PNS is divided into two sections: the Autonomic Nervous System (ANS) and the Somatic Nervous System (SNS). The PNS sends messages from the body to the spinal cord and/or brain and back. The PNS is made up of all the neurons connecting the CNS to the rest of the body. This division of the nervous system controls the regulation of body systems as well as the processing and creation of memories. The CNS is made up of the brain and spinal cord. Use the interactive diagram below to learn more about the divisions. The nervous system consists of several divisions carrying out various functions. Keep reading to learn more about the divisions of the nervous system, the structures of the nervous system and how messages are transmitted through the nervous system. It is a complex system made up of the brain, spinal cord and the billions of neurons. In our body the nervous system detects and responds to changes from normal functions both inside and outside the body. In this example the teacher is the brain which responded to the change detected by the neurons, the students. The students tell their teacher and the teacher responds by turning up the air conditioning. When the temperature inside the class becomes too hot, the change is detected by the students who begin to sweat. Think of the neurons as students in a classroom. The neurons then send signals to the brain, so that your brain can appropriately respond to the change. These cells are able to detect changes in the environment outside your body. #Dendrite nervous system skin
Your skin is lined with millions of special cells called neurons. What may have happened if you had left your hand on the hot object? How did your body react? You may have immediately moved your hand away. Think about the last time you touched an object that was too hot.
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