Elements of Nervous system 1. Neurons The chief structural and functional units of the Nervous system are Neurons. Neuroglia Types of Neurons. 1. The Sensory Neurons. 2. Associative Neurons. 3. Motor Neurons. Nervous system of flatworm Receptors Nerves and Nerve Plexus Receptors types of Planarian Coordination and Control Chapter No.17 Biology Part 2
