- The human body is made up of about 60% water.
- An adult body has 206 bones, while a newborn has around 270.
- Humans are born with 300 to 350 bones, but many of these fuse together as a child grows up.
- The largest bone in the human body is the femur, or thigh bone.
- The smallest bone is in the ear and is known as the stapes.
- The strongest muscle in the body is the masseter (jaw muscle).
- There are more than 600 muscles in the human body.
- The human brain is the most energy-consuming organ, using up to 20% of the body’s energy.
- Your skin is the largest organ and can account for about 15% of your total body weight.
- Your heart will beat more than 3 billion times in your lifetime.
- A red blood cell takes about 20 seconds to circle the whole body.
- The cornea is the only part of the body with no blood supply – it gets its oxygen directly from the air.
- Your nose can remember around 50,000 different scents.
- Human teeth are just as strong as shark teeth.
- The average person produces about 25,000 quarts of saliva in a lifetime, enough to fill two swimming pools.
- Every day, your heart creates enough energy to drive a truck for 20 miles.
- The human body contains about 100 trillion cells.
- Humans shed about 600,000 particles of skin every hour.
- The total length of all the blood vessels in the human body is about 60,000 miles.
- The human eye can distinguish about 10 million different colors.
- Fingernails grow nearly four times faster than toenails.
- Human lips are hundreds of times more sensitive than the tips of a person’s fingers.
- Babies are always born with blue eyes. The melanin in a baby’s eyes often needs time after birth to be fully deposited or to be darkened by exposure to ultraviolet light, later revealing the baby’s true eye color.
- The human brain has a memory capacity equivalent to more than four terabytes on a hard drive.
- A human sneeze can travel about 100 miles per hour or more.
- Your ears and nose never stop growing.
- The liver is the only organ in the body that can fully regenerate.
- Each person’s distinct smell is determined by the specific combination of compounds in their body odor.
- Our bodies give off a tiny amount of light that’s too weak for the human eye to see.
- Human skin is home to over 1,000 species of bacteria.
- There are more bacteria in a human mouth than there are people on Earth.
- Humans are bioluminescent and glow in the dark, but the light that we emit is 1,000 times weaker than our human eyes are able to pick up.
- Our feet can produce a pint of sweat in a single day.
- When awake, the human brain produces enough electricity to power a small light bulb.
- The adrenal glands change size throughout a person’s lifetime. At birth, they are slightly larger than a pea and they are at their largest when a person reaches puberty.
- Your body contains about 0.2 milligrams of gold, most of it in your blood.
- The human lung contains approximately 1,500 miles of airways and over 300 million alveoli.
- Each kidney in the human body contains about 1 million individual filters that cleanse around 1.3 liters of blood every minute and push out close to 1.5 liters of urine every day.
- In a lifetime, a human body goes through 100,000 heartbeats per day, 35 million beats per year, and 2.5 billion beats in an average lifetime.
- The digestive system of the human body is around 30 feet long, running from the mouth to the anus.
- The human body has enough iron in it to make a metal nail up to 3 inches long.
- Your left and right lungs aren’t exactly the same. The lung on the left side of your body is divided into two lobes while the lung on your right side is divided into three. The left lung is also slightly smaller, allowing room for your heart.
- Stomach acid is strong enough to dissolve stainless steel.
- Your sense of smell is around 10,000 times more sensitive than your sense of taste.
- The largest organ in the body, based on its surface area, is the skin.
- The total weight of the bacteria in the human body is 2.2 pounds.
- Your body has enough fat to make seven bars of soap.
- Your brain can generate about 23 watts of power (enough to power a light bulb) when you’re awake.
- The longest recorded time someone has ever gone without sleep is 11 days.
- If you stretched out the 300,000,000 capillaries in your lungs end to end, they would stretch from Los Angeles to New York.
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