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.
Many freedivers can hold their breath 8-10 min. Though most people can only hold their breath for around 1 min. On the set of The Oprah Winfrey Show on April 30, 2008, David Blaine broke the world record by holding his breath for 17 minutes and 4 seconds.hough most people can only hold their breath for around 1 min. On the set of The Oprah Winfrey Show on April 30, 2008, David Blaine broke the world record by holding his breath for 17 minutes and 4 seconds.