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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.