The brain is the most complicated human organ. From the outside they look a bit like a walnut, through all those folds and grooves. Inside it is no more than a liver-colored soft mass, not much bigger than two clenched fists. Yet this mass is very important for our functioning.
The brain is also called encephalon or the brain. Together with the spinal cord and the nerves in the body, they are part of the nervous system and lie within the protection of the skull. Through the senses comes in all kinds of information and the brains are constantly working to this information process . For every kind of information, language, emotions, memory and movement, is a separate area in the brain.
You can classify the brain globally in the cerebellum, the cerebrum and the brainstem. The big brains are divided into two halves: hemispheres. Each half controls the movement of the muscles on the other side of your body. The hemispheres are in contact with each other via the brainbar. Through this nerve path, both halves exchange information with each other, in this way information from one half is always available to the other half.
The outside of the big brain is covered by the cerebral cortex, also called cerebral cortex. The cerebral cortex shows many grooves (sulci). These grooves separate the windings (gyri) from each other. The brains get a large surface through all windings. This allows the brain to contain more nerve cells. Some grooves in the cerebral cortex are deeper: these grooves divide the large brain into four large lobes.
The cerebral cortex consists of a thin layer of nerve cells, neurons. This layer is also known as the gray matter. Immediately beneath this layer, inside the brain, is the white matter. These are the foothills of the neurons. The different parts of the brain are connected to each other and to the spinal cord through these processes.
At the back of the brain are the small brains. Like the large brains, they are heavily pleated and the outer layer is formed by gray matter. The brain stem forms the connection between the large brain, the spinal cord and the small brain.
The two hemispheres of the brain, hemispheres, are built around four brain chambers (ventricles). These rooms are filled with cerebrospinal fluid. The brain floats, as it were, in the fluid. This fluid serves as a pad for the brain and spinal cord. In addition, it eliminates waste and helps to maintain a good body temperature.
Every day the brain chambers produce between four and five hundred milliliters of cerebrospinal fluid. This is completely replaced three times a day. The cerebrospinal fluid is absorbed into the bloodstream at the surface of the brain.
Finally, the brain (and spinal cord) are surrounded by three meninges, meninges. The first soft brain membrane (pia mater) contains blood vessels. Around this is the spider web (arachnoid). Blood vessels are present in the space between these two membranes and there is cerebrospinal fluid. Around the two membranes is the protective hard meninges, dura mater
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