Lobsters have blue blood.
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.
Consumption of TNT turns urine amber or deep red, which people often mistake for blood.
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
20 minutes after smoking a cigarette, blood pressure drops to normal.