Nerves Vertebrate and invertebrate organisms, other than simple primary animals, have a large network of nerves
scattered throughout the body. Through this network, organisms can sense dangers before they occur. For example, when attacked by predatory organisms or when they are exposed to natural disasters, Fire, earthquakes and volcanoes. In addition to being able to overcome climatic changes and difficult environmental conditions, such as feeling cold or hot or living in very cold polar regions or in very hot deserts, these organisms can identify the concept, parts and functions of the nervous system. The nervous system The nervous system is a large number of neurons connected to each other and distributed throughout the body, where the nervous system represents a large network and central processing unit in living organisms, especially the human body, through which all orders are connected to all parts of the body, It is also responsible for organizing all vital processes, and also conducts cognitive processes. The nervous system in living organisms resembles a computer. It contains a central processing unit that sends and analyzes various commands. The nervous system divides the nervous system according to its function and importance into two parts: The central nervous system: Consists of the most important parts and two members of the human body namely the brain and spinal cord, where the brain is the main part of the human body, where it analyzes information from sensory organs such as eyes, Of the senses, and sends the orders necessary for these members, and also organizes the vital processes in the human body, especially the regulation of hormones, the spinal cord, which represents the main center for the transfer of information to and from the brain, and the reactions to different circumstances. The peripheral nervous system: This device transfers data, commands and information from the brain and spinal cord to all parts of the body. It also transmits information transmitted by the senses to the brain and spinal cord. Functions of the nervous system The nervous system has many functions, which represents the central unit in the human body and the functions performed by: Analysis of mathematical and mathematical complex and simple. Store information in long and short-term memory. Receive information from sensory organs such as eye, ear and skin and send appropriate orders to these members. Regulation of the function of the major glands and the proportions of hormones in the blood. Regulate the number of heartbeat, expand the arteries, and regulate the work of skeletal muscles. Regulating the processes of inhalation and exhalation. The organization of digestive processes and constriction of small and large intestine.
