What does the brain look like?
The brain is the body that coordinates andstabilizing all vital functions of the human body and exercising control over behavior and psyche. All our thoughts, feelings, feelings, desires and coordination of movements are related to the work of the brain, and if the brain stops working normally, then a person can go into a vegetative state, that is, his or her capacity for action in all actions, feelings and reactions in response to external stimuli. The article is devoted to the structure of the brain, namely, how the brain of people, the most complex and highly organized organ, whose functionality is many times more complicated than the brain of other representatives of the animal world, looks like.
What does the human brain look like?
The nervous system consists of the head and spinalthe brain. It is associated with various parts of the body, peripheral nodules and nerves. The brain is a symmetrical organ, like the rest of the rest of the human body. At birth, its weight reaches about 0.3 kilograms, further with maturity, it reaches a weight of one and a half kilograms. With an external examination of the brain, two separate hemispheres of the brain, primarily the deeper parts of the brain, are of primary interest. The plane of the hemispheres is covered with furrows and bends, the so-called convolutions, increasing the surface area of the cortex or the outer shell of the brain. Behind the main hemispheres, there is a cerebellum, its surface is also covered with furrows. In the human body, the cerebellum is responsible for coordinating the movements. Slightly deeper than the large hemispheres, the brain stem is placed, passing into the spinal cord. From the trunk and the spinal cord, nerves recede, through which impulses from internal and external receptors are transmitted to the brain, and in the opposite direction the brain transmits signals to the muscles and glands. 12 pairs of cranial nerves leave the brain.
What the brain looks like
- The brain, namely its main part, consists ofseveral types of substances that perform a variety of functions. So, the gray matter of the brain, which consists of nerve cells, helps to form the brain, and a white substance consisting of nerve fibers, conducts nerve impulses, and connects different parts of the brain into one whole.
- The human brain is protected by the skull, and the dorsalthe brain - the spine. Between the bone walls and the brain itself there are three shells. Outer is a rigid shell, the inner is soft, and between them is placed a third shell, arachnoid or arachnoid. The cavities between the shells are filled with cerebrospinal fluid, the composition of which is similar to the composition of blood plasma. The liquid is produced in the ventricles of the brain and, circulating in the spinal cord and brain, it carries nutrients along them.
- The brain nutrition is carried out mainlyThe carotid artery, through which useful substances and oxygen enter it. At its very base, the artery divides into smaller branches that reach all parts of the brain.
- Although the brain mass reaches only about twopercent of the total body weight, 25% of the blood circulating throughout the body and a proportional amount of oxygen continuously flow to it. The energy reserves of the brain are not too great, so it is quite dependent on oxygen supply. There are special, safety mechanisms that protect cerebral blood flow in case of possible bleeding or trauma. A feature of cerebral circulation, is the presence in it of the blood-brain barrier. It consists of membranes that reduce the permeability of the walls of the vessels and prevent the penetration of undesirable substances into the body of the brain. Thus, this barrier performs a protective function. Also, the barrier serves as a protection against the penetration of various drugs into the brain.
What the spinal cord looks like
The spinal cord consists of the very body of the brain,located inside the spine, as well as from the nerve roots that extend into the intervertebral discs. Nervous processes extend to almost all parts of the body, from the occiput to the lower limbs. The spinal cord, as well as the head, consists of three membranes, hard, soft and spiny. The area between the outer shell and the bones of the vertebrae is filled with a venous network and fat. Inside the spinal cord is a cerebrospinal fluid, the main function of which is to feed the spinal cord with oxygen and nutrients.
What does the brain tumor look like?
The brain tumor is a heavythe disease, regardless of whether it is benign or malignant, small or large. The bottom line is that the human brain is the most functional organ in the human body. And in this situation, when a tumor is clamped with any areas of the brain, their normal functioning ceases. Among these sites may well be the zones responsible for vision, hearing, smell, motor reflexes or parts of the brain that are responsible for the performance of vital organs. Tumors of the brain are relatively rarely characterized by their numerous and metastases to other internal organs. I think that how the brains of a person look like, jargon, and what are their main functions, it became clear and clear to you, stay with us, we are always glad to give you new information and advice.
