The sensory or afferent neurons are those that transmit impulses from the circumference to the CNS, which is the central nervous system that is made up of the brain, which is the one located in the skull cavity and the spinal molecule is responsible for carry nerve impulses to the 31 pairs where 8 are cervical, 12 are thoracic or dorsal, 5 lumbar, 5 sacral, 1 coccygeal of spinal nerves, communicating the brain with the body.
The afferent neurons somatic are those that are handling stimuli like pain, temperature, touch and pressure, but while the visceral afferent handle stimuli from the viscera which is a body contained in the main cavities of the human body and animals such as glands that are cells where their function is to synthesize chemicals such as hormones to release them and blood vessels are hollow structures and are formed by tubes that conduct blood driven by the action of the heart, which is the one that collects the blood from every corner of the body.
On the other hand, the efferent motor neurons are the ones that handle the impulses from the central nervous systems to the effector cells just like the sensory cells, where there are somatic efferent and visceral efferent neurons that are the first ones in charge of sending stimulus to the thin smooth muscle or skinny, but the second is the one that transmits involuntary impulses to the smooth muscle and glands.
