What is the relationship between the brain and the nervous system?

In higher animals, including humans, brain and nervous system, they are physically connected. Both consist of specialized cells called nerve cells or neurons. Technically, the brain is part of the nervous system, along with mixes and individual nerve cells distributed throughout the body. In medicine and biology, however, the brain and the nervous system are often considered separate organs and both represent a specialized study field. Together, these organs are responsible for the thoughts, feeling and response to external stimuli.

The brain and the nervous system are made exclusively from neurons. Unlike other cells that are microscopically small, individual neurons in humans may be up to 3 feet (1 meter). For larger animals they can be even longer; For example, in giraffes one neuron can reach 15 feet (5 meters). In the body, neurons stretch to all limbs and provide feeling, pain and touch. In the brain, billions of neurons Tightly are grouped into a complex network capable of highly advanced processes.

neurons use chemical and electrical signals to communicate with each other with other cells. These signals are mediated at very high brain speeds and nervous system. For example, if a person pulls the tip, the nerve cells automatically register pain and other feelings, such as sudden stopping in motion and the general shape of the object that was hit. All these feelings are transported neurons in the spinal leg and then to the brain, usually in less than one second. The brain, in turn, controls instinctive reactions, such as removing the foot from a damaging object, as well as voluntary reactions such as a scream of pain.

Both the brain and the nervous system are composed of neurons, but in the brain these cells have an incredibly complex organization specialized function. Axons, neuron communication bodies, form a huge net in the core of the brain, sometimes called white matter. Communication through the connection of the called SonPSE, axons and neurons control thinking, emotions and all other brain functions, voluntary or others. In the human brain, these synapses are a number in trillion and are able to process millions of functions in any other second.

The brain and spinal cord together are called the central nervous system because they are responsible for processing most nerve functions. The spinal cord and connected nerve cells throughout the body are called the nervous system, and this may or may not include the brain, depending on the focus of the study. In this respect, the relationship between the brain and the nervous system is a constant, interconnected activity. This activity is responsible for all activities of the organism and indeed the function of That itself represents life.