Question

our nervous system has three main parts

Answer 1

Hey mate here's your answer

Our nervous system has three main parts they are Brain, Spinal cord and neurons.

Hope it helps ☺️

Answer 2

Three main parts of nervous system are as follows ⏩⏩⏩
✔️✔️Central nervous system (CNS) 
*is composed of brain and spinal cord...* 

✔️✔️Peripheral nervous system (PNS)

*is composed of all body nerves that lie outside of your central nervous system...*

✔️✔️Autonomic nervous system (ANS) 
*controls the involuntary actions of your body organs...*