Nova Scotia, New Brunswick, and Canada are the horns, the head, the neck, the shins, and the hoof of the ox, and the United States are the ribs, the sirloin, the kidneys, and the rest of the body.
What about my brain? What about my heart? What about my kidneys and my gallbladder?
The brain secretes thought as the stomach secretes gastric juice, the liver bile, and the kidneys urine.
A man can be riddled with malaria for years on end, with its chills and its fevers and its nightmares, but if one day he sees that the water from his kidneys is black, he knows he will not leave that place again, wherever he is, or wherever he hoped to be.
I'm a prime example of the way kidney disease strikes silently.
The brain is a tissue. It is a complicated, intricately woven tissue, like nothing else we know of in the universe, but it is composed of cells, as any tissue is. They are, to be sure, highly specialized cells, but they function according to the laws that govern any other cells. Their electrical and chemical signals can be detected, recorded and interpreted and their chemicals can be identified; the connections that constitute the brain's woven feltwork can be mapped. In short, the brain can be studied, just as the kidney can.
David H. Hubel