What is the nervous system ?
nervous system - a structure whereby all function bodies and human livelihoods.In this article you will learn about the nervous system, its components, functions and types.
central nervous system
anatomical structure of the nervous system involves the separation of the central and peripheral.What is the nervous system?You can define this concept as the interaction of these two subsystems, as central - it's brain and spinal cord, and peripheral - it is extending them to all parts of the body spinal and cranial nerves and ganglia.
Thus, the central nervous system is connected with all parts of the body through nerve fibers - neurons, including neuronal chains are built.To understand what the central nervous system and how it works, it is necessary to imagine its location.
spinal cord of an adult weighs about 30 grams.and it is in the length of about 45 cm. It is located in the medullary canal, surrounded by the meninges, which act as shock absorbers.The volume of the spinal cord along its length is the same, the thickening is only in the cervical and lumbar.This is where the nerve endings are formed upper and lower extremities.Total spinal cord has 5 sections: cervical, thoracic, lumbar, sacral and coccygeal.
brain located in the skull, and is divided into right brain, which is responsible for the formation of imaginative thinking, and left, responsible for abstract thinking .. Also highlighted stem and cerebellum.
Research confirmed that the female brain is easier male about 100 grams .. The explanation for this may be that the male body is more developed physically than women.In this form the brain begins in the womb, and the actual size of only up to twenty years.
somatic nervous system
accepted conditional division of the autonomic nervous system and the somatic.Moreover, the somatic nervous system is sometimes called "the animal," ieanimal characteristic.This means that it is responsible for the management of musculoskeletal mass man, his movement in space, its relationship with the environment, as well as the work of his senses.
autonomic nervous system
Consider what the autonomic nervous system.This part of the nervous system, responsible for the work of the heart muscle, blood vessels, as well as some types of glands.Adopted to separate two parts of the autonomic nervous system: the sympathetic and the parasympathetic.They complement each other.
sympathetic nervous system
The sympathetic nervous system is responsible for the processes that need to mobilize the resources of the body in case of stress or emergency.This heart rate, changes in blood pressure, blood sugar level, pupil dilation, and the work of the bronchi.This is the understanding of what the sympathetic nervous system.In support of her acting and the parasympathetic nervous system.It regulates the function of the bladder, rectum, genitalia, ieIt helps to store and restore the body's energy resources.
parasympathetic nervous system
necessary to consider separately what the parasympathetic nervous system.It lowers blood pressure, reduces heart rate, regulates the digestive system.
Controlling the sympathetic and parasympathetic systems is due to the special vegetative apparatus located in the brain.
need for prevention and prevention of diseases of the autonomic nervous system, because it causes can become even changing weather conditions, such as extreme heat or cold.A symptom may serve as redness or paleness of the face, increased heart rate, increased sweating.Therefore it is necessary to avoid stressful situations, diseases due to the weather, to try to follow workplace safety, to comply with a healthy diet and undergo regular medical check-ups and in time to see a doctor when trouble occurs.