Internal organs

Nervous system and brain

Nervous system and brain


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Our sensory organs such as eyes, nose, tongue, skin sensors and ears perceive stimuli. This information is transmitted to the cerebrum via the nervous system, where the sensory stimuli are processed and the corresponding reaction is initiated. We can control some of these reactions in a targeted manner, others cannot be influenced.

We have little or no influence on the reactions of the vegetative nervous system. This controls, for example, the heartbeat, sweating, breathing, circulation, metabolism, digestion, and body temperature. In contrast, the reaction to most sensory stimuli can be specifically influenced. If the eye sees an obstacle, for example, depending on the situation, you decide whether to stop, choose a different route, cross it or clear it.

The corresponding action is then carried out with the help of the motor nervous system, which coordinates the commands of the brain with the muscles and thus enables the corresponding movement in the environment. In addition to the sensory stimuli, current states of the body are also gathered and processed in the cerebrum via the nervous system. The information is transmitted via nerve cells that communicate with each other using electrical signals. (vb)

Nervous system & brain

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Author and source information


Video: Neurons or nerve cells - Structure function and types of neurons. Human Anatomy. 3D Biology (December 2022).