What are 20 Parts of the nervous system and their functions?

Neurone to carry electrical signals
Synapse transmit action potentials from neurone to neurone
Cerebrum voluntary muscle contraction, reason, emotion
Corpus callosum connects two cerebral hemispheres
Hypothalamus osmoregulation, thermoregulation, release hormones
Medulla oblongata reflex centres (coughing, breathing, sneezing etc)
Cerebellum balance, finer movement, reticular activating system
Optic nerve to transmit generator potentials from the eye to brain
Olfactory not sure

And that's all I can think of at the moment, hope it helps though

I'll give you a list of parts, but you will have to do the research for your homework.

Occipital cortex
Parietal cortex
Temporal cortex
Frontal cortex
Corpus callosum
Pituitary
Olfactory bulb
Cranial nerves
Thalamus
Hypothalamus
Inferior colliculus
Superior colliculus
Cerebellum
Pons
Ventricles
Medulla
Reticular formation
Pyramidal tract
Dorsal root ganglion
Decussation of the pyramids