Why do whales a fountain?
Whale - this is not a fish, as many think, but a mammal. Of course, the appearance is different from the usual people to cats and dogs, but their young, he also feeds the milk. Whales are warm-blooded animals. Fetal development occurs in utero. And small whales are born not in the form of eggs and live births. The first days of life of a small little whale his only power is the mother's milk.
The whales appeared on the planet as a result of evolution. Their ancestors did not live in the ocean and on land. Therefore, the fish, as a new form of life on the planet, it was necessary to adapt to aquatic habitat conditions.
Despite the fact that whales live in water, they do not have gills. Their body breathing nature has created light. During the entire existence of whales their respiratory system is constantly evolving. Nares gradually moved up from the end of the head. At present nostrils whales presented a pair of breathing holes. They make getting oxygen easier.
When a whale plunges into the water, his airways are closed to prevent water from entering. For this purpose, it has a small valves. In the whale's digestive and respiratory systems are not connected with each other. Therefore, entry of water into the lungs through the mouth is possible.
On the surface of the ocean whales pop up every 10 minutes. But if necessary, they may be in water depths of up to 45 minutes. When the kit is shown on the surface, the first thing he frees the light from the used air. Furthermore, this procedure is accompanied by a loud noise that can be heard at a great distance.
This is the reason for the emergence of a strong fountain. Fountain that spews kit consists of the exhaust air and water vapor.
In order to gain a lungful of fresh air kit produces fountain repeatedly. Thereafter, it is lowered into the sea depths. It is known that some whales can dive to a depth of 600 meters. And some very large representatives are able to lift the tail above the water and jump in the air, completely breaking away from the water surface.