One of the first things that most designers forget about CSS descendant selectors is that they are flexible. When CSS defines a descendant, it doesn't care whether the tag in question is the direct child, the grandchild, or some great-great-great-descendant of the initial element.
From the retina, visual information passes onto the bipolar cells and then to the optic nerve's ganglion cells. The optic nerve, which begins at the retina, is the sole visual pathway to the brain. Light information is conveyed as an electrical action potential through the neurons.
Neurons communicate through a series of electrical and chemical reactions. Now you can send a signal and fire a neuron to see how information passes from one neuron to another. Follow Your Visual Pathway. Discover how the images of what you see are processed in the brain by building them back together step by step.