Sensory neurons convey signals from the outside world to our brain for interpretation. As they mature, sensory neurons grow radially outward, expanding their volume over 1,000 times that of other animal cells. This growth in size is important, because the conduction speed of signals increases as the diameter of a neuron increases. In these sensory neurons, axons (which transmit signals) are stained in green while the cell body is stained red.
Image by Dr. María Alejandra Lopez-Verrilli, Pontificia Universidad Católica de Chile.