Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
Overview of blood flow through vessels in a closed circulatory system.
blood vein and vessel
Red Blood Cells
Formation of Blood Cells
Red Blood Cells
Blood vessels associated with the nephron. The glomerulusis a ball of capillaries that have unusuall