? Dolphins are one of the common animals living in the ocean. Because they live in the same environment as some marine fish, many people think that they also belong to fish, and fish breathe with gills, so dolphins also breathe with gills. But in fact, this is a wrong view. Although dolphins also live in the water, they are not fish, and they do not have gills, so they do not use gills to breathe. Although
dolphins do not have gills and cannot breathe with gills, they have more efficient respiratory organs, namely lungs. Dolphins also use their lungs to breathe, just like other mammals. Dolphins breathe differently, which is the main difference between dolphins and the fish around them, but there are also some similarities between dolphins and the fish around them. For example, dolphins also have fin-like structures called "flippers". Dolphins swim very fast and rely heavily on these flippers.
by? As mentioned above, dolphins are not fish, so they do not have gills, nor do they breathe by gills. Dolphins are mammals, belonging to mammals, compared with fish is a higher animal, their body structure is more advanced, respiratory organs are one of the important manifestations. Lungs are found in almost all mammals, and mammals use them to breathe, as do dolphins. Compared with gills, the respiratory efficiency of lungs is relatively high.
Although dolphins breathe more efficiently with their lungs, this also results in their inability to breathe in the water. That is to say, after swimming in the water for a period of time, dolphins must come out of the water to breathe, and when breathing with their lungs, they must touch the air above the sea surface. If you look closely at dolphins, you will find that they have nostrils, which grow above their heads, and when they breathe, their nostrils will come out of the water.
