Interesting Facts on the Human Body

URL: http://www.youtube.com/watch?v=MM2dtqpR1Qs

Summary:
1) Our left lung is smaller then our right lung to make room for our heart
2) Everyday an adult body produces 300 billion new cells
3) In one hour, our heart works hard enough to produce the equivalent energy to raise almost 1 ton of weight 1 yard off the ground
4) Our eyes are always the same size from birth, but our nose and ears never stop growing
5)Our bone is stronger, inch for inch, then the steel in skyscrapers
6)The acid in our stomach is strong enough to dissolve razorblades
7) We use 200 muscles to take one step
8) We use 43 muscles to frown
9) On average, we use 17 muscles to smile

Relevance: This video has many facts about the human body that pertain to things that we have learned in class. this quarter. For example, facts 7 and 8 refer to the muscle system. Along with fact 5 which refers to the skeletal system.