Aquatic animals have developed a respiratory system that is not based on the use of lungs. The organ that plays the lungs’ role and which draws oxygen from the water is the gill. This animation illustrates where the gills are located and how oxygen from the water passes into the fish’s bloodstream.
Click twice on the "zoom" button to see gas exchanges at the level of the gill's lamellae.
- To distinguish between pulmonary respiration and respiration with gills.
- To understand the identical role played by gills and lungs in the circulation of the blood.
As with all living creatures, aquatic animals respire by taking in oxygen and excreting carbon dioxide. We say that they carry out aquatic respiration, as the gas exchanges are made with the gases…
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