Nervous system

The nervous system includes motor neurons, autonomic nerves, and somatic nerves. Motor neurons transmit signals from the brain and spinal cord to muscles, controlling body movements such as muscle contraction and posture maintenance. Autonomic nerves regulate the functions of internal organs, blood vessels, and smooth muscles, with the sympathetic and parasympathetic nervous systems maintaining a balance to stabilize the internal environment. Somatic nerves are responsible for transmitting skin sensations and skeletal muscle movements, enabling the body to perceive external stimuli and respond accordingly.

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