Dictionary » B » Blowholes



1. A cavern in a cliff, at the water level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity.

2. A nostril or spiracle in the top of the head of a whale or other cetacean.

there are two spiracles or blowholes in the common whales, but only one in sperm whales, porpoises, etc.

3. A hole in the ice to which whales, seals, etc, come to breathe.

4. An air hole in a casting.

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... mammals have hair. But whales and dolphins had hair as embryos. As adults whales have hair around their mouths and dolphins have hair around their blowholes.Having only a little bit of hair reduces the amount of water resistance allowing these mammals to swim faster. Hope this answers your question.

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by Bio_Girl015
Thu Apr 20, 2006 8:07 pm
Forum: Zoology Discussion
Topic: mammals
Replies: 10
Views: 5603

Kodiak vs. Blue Whale

... whale blubber is roughly 2 inches thick . http://www.enchantedlearning.com/subjects/whales/species/Bluewhale.shtml These gray-blue whales have 2 blowholes and a 2-14 inch (5-30 cm) thick layer of blubber . We are talking about the high end of both species... largest bear in the world vs largest ...

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by Jschiers
Sat Jan 14, 2006 2:17 am
Forum: Zoology Discussion
Topic: Kodiak vs. Blue Whale
Replies: 32
Views: 19551

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