Mosquitoes don't just bite you, they also pee on you.
11
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
Lobsters have blue blood.
476
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Your body is creating and killing about 2.4 million red blood cells per second.
17
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
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93