Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
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Mosquitoes don't just bite you, they also pee on you.
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From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
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20 minutes after smoking a cigarette, blood pressure drops to normal.
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Your body is creating and killing about 2.4 million red blood cells per second.
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It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
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Consumption of TNT turns urine amber or deep red, which people often mistake for blood.
301
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
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