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- During evolution, blowholes migrated to the top of the head, which facilitates breathing at the water surface. Whales cannot breathe through their mouth because, unlike terrestrial mammals, their digestive system and respiratory system are not connected. The blowhole leads to the nasopharynx, or nasal duct.
baleinesendirect.org/en/discover/life-of-whales/physiology/respiratory-system/
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As whales reach the water surface to breathe, they forcefully expel air through the blowhole. The exhalation is released into the comparably lower-pressure, colder atmosphere, and any water vapor condenses.
Aug 26, 2021 · The location of their “nose”, the blowhole, on the top of their head allows them to exchange breathing air efficiently during the sometimes brief surfacing. But how does the blowhole of whales and dolphins actually get on top of the head?
Feb 6, 2012 · The whales were coaxed from breathing hole to breathing hole, slowly moving out toward the open ocean. Operation Breakthrough. On the other side of the frozen ice, a Soviet icebreaker...
Dec 1, 2010 · Blubber, blowholes and flukes are among the hallmarks of the roughly 80 species of cetaceans (whales, dolphins and porpoises) alive today. But, because they are mammals, we know that they must...
- Riley Black
Mar 18, 2008 · Nasal Drift in Early Whales Whales breathed with more ease when they no longer had to lift a snout above water. The nostrils migrated upward toward the top of their head, as ancient whales spent more time immersed in the water. Blowholes help to distinguish modern forms of whales.
Aug 5, 2021 · Cetacean experts have long puzzled over how the nasal passage switches during embryonic and fetal development from a palate-parallel pathway to an angled orientation terminating in a blowhole.
May 25, 2012 · The whales are left stranded without enough breathing holes to lead them to open water, and hundreds of them will squeeze into shrinking openings in the solid ice. Many narwhals suffocate and die while fighting for air in these tight spaces.
