They do not make a organ but are part of an organ which is the brain.
The Brain
neurons have nissl bodies
These are those neurons which carry impulses from the organ or part of body to the brain
neurons
A Synapse is the space between two neurons or between a neuron and a receptor organ. A single neuron can have a few, or several hundred synapses.
Neurons
Adrenal Glands
That organ is called as brain. You have more than 100 billion neurons in your brain.
It is said that central nervous system and enteric nervous system contain 1 billion neurons each.
yes
Sensory neurons (afferent neurons) send sensory signals from the body to the Central Nervous System. Their cell bodies are always found in a ganglion outside the central nervous system. Motor neurons (efferent neurons) send signals from the central nervous system to the muscles and glands of the body. Their cell bodies are always located in the central nervous system.
Organ of Corti is the hearing organ and it rests on basilar membrane; consists of supporting cells and hair cells. Axons of the neurons that begin around the organ of Corti, extend in the cochlear nerve to the brain to produce the sensation of hearing.