ALL ABOUT WHALES!
|What is a Whale?||Whale Information Sheets||Anatomy and Behavior||Extreme Whales||Whale Myths||Whale Evolution||Whale Classification||Whale Glossary||Whale Activities||Whale Index|
Number of Blowholes: Toothed whales (like sperm whales, beluga whales, dolphins, etc.) have one blowhole. Baleen whales (like humpbacks, blue whales, gray whales, bowhead whales, etc.) have two blowholes, side by side.
Why do some whales have one blowhole and some have two?
Most mammals have two nostrils (blowhole equivalents). One of the nostrils (air-passages) of toothed whales evolved into their echolocation system (the sensing system in which they make and recieve high-pitched sounds in order to orient themselves, catch prey, and communicate), leaving them with only one blowhole.
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below
Overview of Site|
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Parts of Speech
The Test of Time
Biology Label Printouts
Physical Sciences: K-12
Art and Artists
Label Me! Printouts
|Search the Enchanted Learning website for:|