The average adult human body is made up of around 37.2 trillion cells, each performing specialized functions to keep us alive and well.
The human stomach produces such strong acid that it can dissolve tissue, so it regenerates its lining every 3 to 4 days to prevent self-digestion.
Your brain generates about 20 watts of electricity, enough to power a small lightbulb, even while you're resting.
While it may sound bizarre, about 60% of the genes in the human genome are similar to those found in bananas, showing the interconnectedness of life.
Saliva plays a key role in digestion and oral health, and your body produces about 1 to 2 liters of it every single day.
The human liver is the only internal organ capable of regenerating lost tissue—even if as much as 75% is removed, it can grow back.
This vital organ pumps about 2,000 gallons of blood through your body every day by beating around 100,000 times.
Blinking keeps your eyes lubricated and protected. Most people blink 15–20 times per minute, totaling over 20,000 blinks per day.
The stapes, located in the middle ear, is the smallest bone in the human body, measuring only about 0.1 inches long.
Your skin acts as a protective barrier and is the largest organ of the body, covering about 20 square feet in adults.
Just like fingerprints, every human has a unique tongue print that could potentially be used for biometric identification.
Trillions of microorganisms live in and on your body, and they actually outnumber your own human cells—many of them are essential for digestion and immunity.
Ounce for ounce, human bone is stronger than steel. A cubic inch of bone can bear a load of over 8,000 pounds.
Blood circulates through about 60,000 miles of vessels in your body, delivering oxygen and nutrients and removing waste.
The human nose is more powerful than we think—it can distinguish more than one trillion different odors.
Every minute, you lose about 30,000 to 40,000 dead skin cells. In fact, your skin completely renews itself every 28 days.
Water makes up around 60% of the adult human body and is crucial for regulating temperature, transporting nutrients, and maintaining cellular function.
Our bodies emit a tiny amount of visible light, known as bioluminescence, but it’s 1,000 times weaker than the human eye can perceive.
While the brain processes pain signals, it cannot feel pain itself—which is why brain surgeries can be performed while the patient is awake.