20 minutes after smoking a cigarette, blood pressure drops to normal.
37
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
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
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
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
Lobsters have blue blood.
476
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217