Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
During a typical human life span, the human heart will beat approximately 2.5 billion times.
A sneeze can travel as fast as 100 miles per hour.
There is a disease called ichthyosis that turns the skin scaly like a fish.
Your skin is actually an organ.
Fingernails grow nearly 4 times faster than toenails.