Gravitational Resistance: The Instant Calibration of the Baroreflex Network

When you lie down, your heart pumps blood easily on a flat, horizontal plane. But the second you stand up, gravity violently pulls all the blood in your upper body straight down toward your legs. Without an immediate, massive physiological correction, your brain would lose oxygen in seconds, and you would black out on the floor. The invisible lifesaver that prevents this daily catastrophe is the...