Brain 101 | National Geographic

– [Narrator] The brain is the most complex organ in the human body. As part of the nervous system, the brain coordinates all of the body’s function. In adult humans, the brain is a three-pound gelatinous mass of fat and protein. It’s comprised of four main regions: the cerebrum, the cerebellum, the brainstem, and the…

What Are You?

What Are You?

Are you your body? Well, kind of, right? But, is there a line where this stops being true? How much of yourself can you remove before you stop being you, and does the question even make sense? Your physical existence is cells, trillions of them, at least ten times more than there are stars in…