What is the nervous system?
The nervous system is a structure through which all organs and life support systems of a person function. This article will discuss the nervous system, its components, functioning and types.
central nervous system
The anatomical structure of the nervous system involves the division into central and peripheral. What is the nervous system? You can define this concept as the interaction of these two subsystems, since the central is the brain and spinal cord, and the peripheral is the spinal and cranial nerves and nerve nodes that extend from them to all parts of the body.
Thus, the central nervous system is connected to all parts of the body due to nerve fibers - neurons; neural chains are built from them. To understand what the central nervous system is and how it works, you need to imagine its location.
The spinal cord of an adult person weighs about 30 grams. and is approximately 45 cm in length. It is located in the brain canal surrounded by the meninges, which act as shock absorbers.The volume of the spinal cord along its entire length is the same; there is only a thickening in the cervical and lumbar regions. It is here that the nerve endings of the upper and lower extremities are formed. In total, the spinal cord has 5 divisions: cervical, thoracic, lumbar, sacral and coccygeal.
The brain is located in the region of the skull, and is divided into the right hemisphere, which is responsible for the formation of figurative thinking, and the left one, which is responsible for abstract thinking .. The trunk and cerebellum are also distinguished.
It has been scientifically confirmed that the female brain is lighter than the male one by about 100 grams .. The explanation for this may be that the male body is more physically developed than the female one. At the same time, the brain begins to form in the womb, and reaches its real size only by twenty years.
Somatic nervous system
The conditional division of the nervous system into vegetative and somatic was adopted. Moreover, the somatic nervous system is sometimes called the "animal", i.e. peculiar to animals. This means that it is responsible for managing the musculoskeletal mass of a person, his movement in space, his relationship with the environment, as well as the work of his senses.
Vegetative nervous system
Consider what the vegetative nervous system.It is part of the overall nervous system responsible for the functioning of the heart muscle, blood vessels, and also certain types of glands. It is customary to separate the two parts of the autonomic nervous system: the sympathetic and parasympathetic. They complement each other.
Sympathetic nervous system
The sympathetic nervous system is responsible for the processes that must mobilize the body’s resources in the event of stress or an extreme situation. These are heart rate, change in blood pressure, blood sugar level, pupil dilation and bronchial function. This is the understanding of what the sympathetic nervous system is. The parasympathetic nervous system acts in support of it. It regulates the work of the bladder, rectum, genitals, i.e. helps to accumulate and restore the energy resources of the body.
Parasympathetic nervous system
It is necessary to separately consider what the parasympathetic nervous system is. It lowers blood pressure, helps to reduce the heart rate, regulates the work of the digestive system.
Controlling the sympathetic and parasympathetic systems is due to the special autonomic apparatus located in the brain.
Prevention and prevention of diseases of the autonomic nervous system are necessary, because even weather changes such as extreme heat or frost can be causes. A symptom can be redness or pallor of the face, increased heart rate, increased sweating. Therefore, it is necessary to avoid stressful situations, illnesses due to the weather, try to follow safety precautions at the workplace, follow a healthy diet, and regularly undergo medical examinations and consult a doctor in time when anxiety occurs.