So that means the autonomic nervous system controls the race, the beating of the heart and also controls, for example, the dilation and constriction of our blood vessels. So it's the autonomic nervous system that controls all our involuntary movement, movement that we cannot actually control. Now the somatic nervous system consists of our electrical pathways that only have one neuron. But in the case of the autonomic we usually have two neurons in our electrical pathway. We have a pre ganglionic neuron and a post ganglionic neuron. Now in the case of the somatic system we only use the cetylcholine neurotransmitter.