The human body produces and destroys 15 million blood cells every second.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Crossing over during meiosis leads to allele combinations in sex cells that are not present in the p
Glial cells and their functions.
Recognition of conformational epitopes by B cells.