It takes about 20 seconds for a red blood cell to circle the whole body.
102
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Obsessive nose picking is called Rhinotillexomania.
101
In one day, adult lungs move about 10,000 litres of air.
11
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
A human being loses an average of 40 to 100 strands of hair a day.
133
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89