Mosquitoes don't just bite you, they also pee on you.
11
Your body is creating and killing about 2.4 million red blood cells per second.
17
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
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
Lobsters have blue blood.
476
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
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