Yes, they do have a nervous system.
amoeba
Earthworms and cockroaches have nervous systems but no brain. Hydras have a nervous system consisting of a nerve net but lack a centralized brain. Amoebas do not have a nervous system or a brain.
parasympathetic and sympathetic nervous systems
An amoeba is considered a "single cell organism" and does not have a brain.
The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous systems.
The two kinds of nervous systems are sympathetic and parasympathetic. P.S. The two parts of the nervous system are Central and Peripheral.
Yes roundworms have nervous systems!
parasympathetic and sympathetic nervous systems
systems
Central Nervous System (CNS)
The endocrine and nervous systems allow your body to regulate body functions. The endocrine system does so through hormones, and the nervous system through nervous impulses.
The two systems that make up the peripheral nervous system are the somatic nervous system and the autonomic nervous system.