The Skeletal Muscle System. Skeletal muscles are the muscles found in your legs and arms and throughout the body. The skeletal system is different from the smooth muscle system in organs like your liver and the cardiac muscle in your heart because the skeletal muscles contract voluntarily.he skeletal system is different from the smooth muscle system in organs like your liver and the cardiac muscle in your heart because the skeletal muscles contract voluntarily.
With the benefit of breathing pure oxygen first, the current Guinness World Record for holding your breath underwater is held by Ricardo Bahia of Brazil at a whopping 20 minutes 21 seconds! Most people in good health can hold their breath for approximately two minutes.
Harry Houdini was renowned for his ability to hold his breath for three and a half minutes in the early 20th century. Five years ago, his fellow illusionist David Blaine broke the world record for breath-holding with a total of 17 minutes and 4 seconds. Even that record has since been broken several times, and now stands at over 22 minutes, a sixfold improvement in a century.