You faggots studying diligently for your MCAT? No, you're here, your dick is in your hand, and you've got loli and furry porn in 31 other tabs. Pay attention; I'm gonna help you. If this gets enough attention, I'll make it a thing. You ready? Let's do this.
The nervous system has two primary divisions: the central and peripheral nervous systems. (pic related) The CNS is comprised of the brain and spinal cord, while the PNS (hehe) is comprised of nerve tissues and shit OUTSIDE the brain and spinal cord. This includes 10 out of 12 pairs of cranial nerves (the optic and olfactory nerves are outgrowths of the CNS; we’ll cover that shit in future posts) and all 31 pairs of spinal nerves. Sensory, or AFFERENT neurons, send sensory info from receptors to the CNS. Motor, or EFFERENT neurons, send motor info from the CNS to your muscles and glands. There’s also a third type, interneurons, which are found between other neurons and are numerous as shit. (MNEMONIC: Afferent neurons ASCEND to the CNS, and efferent neurons EXIT to the rest of your body.)