lungs
Because it doesn't enter their lungs,it gets converted into oxygen through the gills.
Fish have gills- thy are similar to lungs, but water gets pumped through them. Oxygen dissolved in the water transfers (in the gills) to the bloodstream of the fish, and carbon dioxide gets flushed out.
fish
it uses its gills
the oxygen goes to the air sacs inside of the lungs.
Dolphins are mammals, not fish. And mammals breathe with lungs, not gills.
the oxygen in your blood comes from the air you breath in . It goes in through your mouth into the lungs and the oxygen gets taken out from the lungs into the cappilaries.
The lungs are responsible for taking in oxygen from the air we breathe and transferring it into the bloodstream. This occurs through the process of gas exchange in the lungs where oxygen moves into the blood vessels in exchange for carbon dioxide.
The blood gets oxygen from the lungs during the process of respiration. Oxygen is inhaled into the lungs, where it diffuses into the bloodstream via tiny air sacs called alveoli. This oxygenated blood is then pumped by the heart to the rest of the body.
Goldfish breathe by drawing in oxygenated water through its mouth. It then closes its throat and forces the water through gill openings where the oxygen in the water is absorbed (inhales) into the fish. The water is pushed out through the gill openings, taking with it the (exhaled) carbon dioxide and ammonia. The gills in fish are the equivalent of lungs in humans. Oxygen gets inhaled through tiny membranes in the lungs or gills and CO2 (and ammonia in fish) is exhaled.
Most animals breathe throught there mouth and nose. Other animals like Whales, Dolphins,. etc. breathe through air holes. Water animals, breathe water through gills. and often suface for oxygen.(Again through mouth or air hole; depending on the animal.)
Diffusion through capillaries