Aortic atherosclerosis is a condition in which plaque builds up in the inner lining of the aortic artery. This condition can cause many symptoms and result in surgery. This article discusses what causes aortic atherosclerosis, symptoms and treatments.
An average scuba diver can stay underwater for 45 to 60 minutes on a 40-foot dive. Many factors affect tank duration, including depth, tank volume, and the diver's air consumption rate.
In order for a dolphin to dive into the water without worrying about inhaling water when it is submerged the muscles surrounding the dolphins blowhole contract to prevent the dolphin from accidentally taking in any unwanted water. As far as how long a dolphin can hold its breath varies depending on the species. Some dolphins can only hold their breath for a few minutes (3 â 7 minutes) while underwater, while other species have been known to hold their breath for over 20 minutes during deep dives. Most of what is known about a dolphins ability to hold its breath is from observations of their dives.