If you’re looking for one of the wonders of the world, look no further than your own body. The nerve impulses in your body travel at over 429 miles per hour, while a single sneeze generates a gust of wind traveling at 100 miles per hour. A heart beats nearly 30 million times each year, and blood travels around 60,000 miles through your body each day. The pressure your heart creates when it pumps blood is enough to squirt the blood up to 30 feet. Within your body, the average red blood cell can live for 120 days, and there are around 2.5 trillion red blood cells inside your body at any given time.
Between all of the tissue and cells that make up your body, new cells—25 million of them—are being produced every single second. When you smile, you’re exercising at least 36 muscles, and the average person produces between four and seven cups of saliva each day. As if that weren’t enough, just one square inch of your hand contains 600 pain sensors, 9000 nerve endings, 75 pressure sensors, and nearly nine feet of blood vessels. When you blush, your cheeks aren’t the only body part changing colors. Your stomach lining turns red along with your cheeks. By the time you reach age 70, you will have shed, on average, 105 pounds of skin cells.