Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Lobsters have blue blood.
476
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Consumption of TNT turns urine amber or deep red, which people often mistake for blood.
301
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