The nervous system is composed of two basic cell types what are they called

Answer;
The nervous system is composed of two basic cell types, namely, the Neurons and the neuroglial cells.

Explanation; 
The nervous tissue is the main component of the nervous system which includes the brain, spinal cords and the nerves. It is a specialized tissue found in the central nervous system (brain and the spinal cord) and the peripheral nervous system (nerves). It consist of the neurons and the supporting cells called neuroglia.
The neurons are responsible for conducting and generating nerve impulses.
Neuroglial or glia cells are involved in many specialized functions apart from supporting of the neurons. There are six in number; four in the CNS and two in the PNS.