[医] 脊椎动物门

[ noun ]
fishes; amphibians; reptiles; birds; mammals
<noun.animal>

Vertebrata \Ver`te*bra"ta\, n. pl. [NL.] (Zo["o]l.)
One of the grand divisions of the animal kingdom, comprising
all animals that have a backbone composed of bony or
cartilaginous vertebr[ae], together with Amphioxus in which
the backbone is represented by a simple undivided notochord.
The Vertebrata always have a dorsal, or neural, cavity above
the notochord or backbone, and a ventral, or visceral, cavity
below it. The subdivisions or classes of Vertebrata are
Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia,
and Leptocardia.