Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
Your heart will pump about 212 million liters in its lifetime.
26
Lobsters have blue blood.
476
Your body is creating and killing about 2.4 million red blood cells per second.
17
20 minutes after smoking a cigarette, blood pressure drops to normal.
37
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
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