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
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Mosquitoes don't just bite you, they also pee on you.
11
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
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
Your body is creating and killing about 2.4 million red blood cells per second.
17
Lobsters have blue blood.
476