Human Body
The incredible machine you live in
Your Saliva Contains a Natural Painkiller 6 Times Stronger Than Morphine
Hidden in human saliva is opiorphin, a natural painkiller that's six times more potent than morphine. Your mouth is literally producing powerful medicine every day.
By Dr. Maya Torres
Your Heart Beats 100,000 Times Per Day Without You Ever Thinking About It
Your heart is an incredible autonomous muscle that pumps 2,000 gallons of blood daily through 60,000 miles of blood vessels, all controlled by its own electrical system that works independently of your brain.
By Dr. Maya Torres
You Have Two Separate Visual Systems and Don't Know It
Your brain processes vision through two completely different pathways - one for seeing and one for moving - which is why you can catch a ball in the dark but can't describe where it went.
By Dr. Maya Torres
Your Fingers Don't Have Muscles - They're Controlled by Your Forearms
Despite being incredibly dexterous, your fingers contain no muscles at all. Instead, they're controlled by a complex system of tendons connected to muscles in your forearms, like a sophisticated puppet system.
By Dr. Maya Torres
Your Stomach Completely Replaces Its Lining Every 3-5 Days
The cells lining your stomach regenerate faster than any other tissue in your body, creating a brand new stomach lining multiple times per week. Without this rapid renewal, stomach acid would digest you from the inside out.
By Dr. Maya Torres
Your Eyes Move in Tiny Jerks Called Saccades 3-4 Times Per Second
Your eyes never actually move smoothly when looking around. Instead, they make rapid, jerky movements called saccades up to 200,000 times per day, and your brain hides this from you by creating the illusion of seamless vision.
By Dr. Maya Torres
Your Brain Uses 20% of Your Body's Energy Despite Being Only 2% of Your Weight
Despite weighing just 3 pounds, your brain consumes as much energy as your leg muscles during a marathon. This tiny organ is the most metabolically expensive part of your body.
By Dr. Maya Torres
Your Body Replaces Itself Every 7-10 Years
Almost every cell in your body is replaced over a 7-10 year cycle, yet you remain you. Some cells refresh in days, others last a lifetime.
By Dr. Maya Torres