NEUROSCIENCE: THE CONNECTIVE BOSS OF HUMAN BODY CORRELATES INTEL SOFTWARE
Kushal Nandi, Arpita Biswas, Suprodip Mandal, *Dr. Dhrubo Jyoti Sen, Dr. Dhananjoy Saha and Dr. Beduin Mahanti
In biology, the nervous system is a highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body. The nervous system detects environmental changes that impact the body, then works in tandem with the endocrine system to respond to such events. Nervous tissue first arose in organisms about 550 to 600 million years ago. In vertebrates it consists of two main parts, the nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists mainly of nerves, which are enclosed bundles of the long fibres or axons, that connect the CNS to every other part of the body. Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent. Spinal nerves serve both functions and are called mixed nerves. The PNS is divided into three separate subsystems, the somatic, autonomic, and enteric nervous systems. Somatic nerves mediate voluntary movement. The autonomic nervous system is further subdivided into the sympathetic and the parasympathetic nervous systems. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The enteric nervous system functions to control the gastrointestinal system. Both autonomic and enteric nervous systems function involuntarily. Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves.
Keywords: Central nervous system, Autonomic nervous system, Peripheral nervous system, Sympathetic nervous system, Parasympathetic nervous system, Spinal nerves, Somatic nervous.
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