- Whales are mammals, and like all mammals, they need to breathe air to survive.
- Their blowholes are located on the top of their heads, and they allow the whales to take in oxygen and expel carbon dioxide.
- When a whale surfaces, it opens its blowhole and takes a deep breath.
- The air travels down the whale's windpipe and into its lungs, where the oxygen is absorbed into the bloodstream.
- When the whale exhales, it expels the carbon dioxide through its blowhole.
- The blowhole also helps whales to communicate with each other. Whales produce a variety of sounds through their blowholes, which they use to communicate with each other over long distances.