Also known as nerve cells, neurons are cells that transmits information through electrical and chemical signals. 

Neurons are the core of the Central Nervous System. The human brain has about 100 billion neurons alone. Neurons communicate with one another through dendrites (bring electrical signals to the cell) and axons (take electrical signals from the cell body).

Neuron types include sensory, motor, and interneurons. Sensory neurons move information to the CNS, motor neurons move information from the CNS outwards, and interneurons allow sensory and motor neurons to communicate directly.