The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
476
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
Mosquitoes don't just bite you, they also pee on you.
11
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
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.
13
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Consumption of TNT turns urine amber or deep red, which people often mistake for blood.
301