Special Operations Forces Center. 1  Fleet Week Jump with the Navy Leapfrogs Experience the Navy Leapfrogs' spectacular Fleet Week jump over San Francisco alongside the team, thanks to a handy helmet cam. Profile: 353d Special Operations Group The 353rd Special Operations Group is the focal point for all U.S. Air Force special operations in the U.S. Pacific theater.
Animals which Breathe through their Skin. Some animals which live on land have a skin which is so thin that gases can easily pass through it. We say that they have a permeable skin. Earthworms and amphibians have a skin which is permeable to gases. Amphibians also have a pair of simple lungs but they are not sufficient on their own for breathing. Large animals which breathe through their skin also use blood to transport oxygen to their tissues and to bring carbon dioxide to the surface of the body.
Although they live in the water, marine mammals like whales, dolphins, seals and sea lions, as well as reptiles like sea turtles, need to breathe air. So while they spend their life swimming in the ocean, they must still come to the surface of the water from time to time to take a breath of air. Fish breathe air through their gills. Marine mammals have lungs and take in oxygen through their blow holes or, in the case of manatees and dugongs, through their snouts. Unlike humans, these marine mammals breathe voluntarily. Animals need oxygen to survive. Animals like mammals, birds and reptiles get their oxygen by breathing air, while animals like fish absorb the oxygen they need from water taken in through their gills, Koontz said. Nine minutes is about the very longest time a human can hold their breath under water.