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Your body’s sweat is mostly water, but it also contains salt and other waste products.
The surface area of the human lungs is roughly the size of a tennis court.
The human body is capable of producing its own natural antioxidants.
Your skin contains around 1,000 to 3,000 sensory receptors per square inch.
The human brain uses about 20% of the body’s oxygen and calories.
The human body’s immune system is capable of identifying and attacking millions of different pathogens.
The human body produces about 50,000 to 70,000 thoughts per day.
Humans can distinguish between over 1 trillion different scents.
"Nothing ever comes to one, that is worth having, except as a result of hard work." —Booker T. Washington
Your body is constantly producing new cells to replace old or damaged ones.