Encyclopedia > Cetacea

  Article Content

Cetacea

Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Cetacea

The order Cetacea includes whales, dolphins and porpoises.

Cetus is Latin and is used in biological names to mean "whale"; its original meaning was more general, "large sea animal". It comes from Greek ketos, a sea monster.

Cetaceans are the mammals most fully adapted to aquatic life. Their body is fusiform (spindle-shaped). The forelimbs are modified into flippers. The hindlimbs are vestigial, they do not attach to the backbone and are not exteriorly visible. The tail has horizontal flukes.

Cetaceans are nearly hairless, and are insulated by a thick layer of blubber.

Cetacea contains 10 families, 78 species.

External links



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Pritzker Architecture Prize

... Tadao Ando of Japan 1996 Rafael Moneo[?] of Spain 1997 Sverre Fehn[?] of Norway 1998 Renzo Piano of Italy 1999 Sir Norman Foster of the United Kingdom 2000 Rem ...