The human body produces about 2 liters of mucus per day.
Why it is true
Mucus protects the lungs, digestive tract and nasal passages from irritants and infections.
Source: Medical Research
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
Human Body
The human body produces about 25 million new cells per second.
Human Body
Human lungs are the only organs in the body that float in water because they contain air.
Human Body
The inner surface of human lungs, if stretched, would cover a tennis court.
Human Body
The human brain has more connections than stars in the Milky Way.
