Verified Answer :

it must be nervous system...
 nervous system recieves and sends electrical signals throughout the body....

Bistai

The nervous system receives and sends electrical signals throughout the body.

The nervous system is the part of an animal that contains several nerves and specialized cells called neurons which receives and sends electric signals between various parts of the body. The nervous system is composed of the central nervous system (brain and spinal cord) and the peripheral nervous system (somatic and the autonomic nervous systems).

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