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.
The average person can last three minutes without air before they die. However I'm not sure how long it takes somebody to become unconscious. However if the drowning person is an athlete, swimmer or has developed larger that average lungs then it will take longer. The women's world record holder for free diving can hold her breath for six minutes without passing out. Source(s): TV.