A closer look

No matter how tall, short, wide, or narrow you happen to be, your cardiovascular system operates on a terrifyingly strict mathematical percentage. The sticky red fluid keeping you alive accounts for exactly seven to eight percent of your total body weight. This means if you step on a scale and weigh 150 pounds, roughly 12 pounds of that is just sloshing liquid blood. You are functionally a giant, heavily pressurized walking juice box.