The Nervous System of the Human Body Essay

The human nervous system is responsible for the transmission, reception and processing of nerve impulses. It controls the movement and emotions of every part of the body, and your thoughts, emotions, and memories. The nervous system is "a rapid electrochemical communication system for all nerve cells in the peripheral nervous system and the central nervous system". The most basic and important part of the nervous system is neurons.

A neuron is a functional unit of the nervous system consisting of only 100 billion neurons in a human brain. Although the size and shape vary, all neurons have three identical parts and can function as the first part of neurons.

The peripheral nervous system consists of 'sensory and motor neurons connecting the central nervous system to other parts of the body'. It consists of two parts, the somatic nervous system controlling skeletal muscle movement and the automatic nervous system controlling internal glands and muscles. Automatic nervous system is a dual system that affect heart rate, digestion and glandular activity. These two systems that make up automatic NS are called sympathetic and parasympathetic NS. Sympathetic NS stimulates the body's defense. When someone feels or irritates something, the sympathetic nerve speeds up the heart beat of the body, raises the blood sugar level, expands the artery, and prepares for you. When someone feels pressure, their parasympathetic NS brings the opposite effect, such as lowering heart rate or lowering blood glucose value to try to relax the body. Every day, these two systems work together to keep the body in a stable internal state.

The peripheral nervous system lay the foundation of the most important nervous system area of ​​the central nervous system. The central nervous system consists of the brain and the spinal cord, but its purpose is very complicated, so it is often compared with a powerful computer. The central NS makes it possible for humans to think, feel, act, and without this area, the rest of the human body will not exist. gray

The human body consists of various systems that work together. These body systems are connected to each other via the key control system - nervous system. The nervous system is divided into two: the central nervous system and the peripheral nervous system. This article will focus on the structure and function of the central nervous system. Both the spinal cord and the brain have white matter and gray matter. White matter contains bundles of various axons. Axons are part of nerve cells, where pulses are transmitted away from the cells. They are explained as being long and threaded. They are covered with myelin and myelin acts as a shock absorber. Gray matter is composed of cell bodies and dendrites. Sensory information is processed in the cell body and dendrites function as receivers of pulses from synapses to neurons. Dendrites lead to synapses, and synapses function as junctions between the two neurons. Gray matter is in the spinal cord, white matter is on the surface

The nervous system is a wonder of the human body; it directly or indirectly controls most object systems. The brain and spinal cord form the central nervous system, and its peripheral part is composed of cells called neurons. Unlike other cells that provide structure or produce enzymes, neurons handle electricity, so these cells are special. Neurons are like switches, but they are much more complicated. However, neurons have three types, each of which has a specific role. Motor neurons are specially designed neurons to treat muscle hypertension and their overall structure resists injury and shock. As its name implies, this neuron is between two neurons either passing or blocking information. This allows you to exclude errors or exception messages and adjust messages sent throughout the body.