Vertebrate

Go down

Vertebrate

Post by kosovohp on Sun Dec 26, 2010 2:01 am

Vertebrates are members of the subphylum Vertebrata, chordates with backbones and spinal columns. About 58,000 species of vertebrates have been currently described.[2] Vertebrata is the largest subphylum of chordates, and contains many familiar groups of large land animals. Vertebrates are the animals from the groups of jawless fishes, bony fishes, sharks and rays, amphibians, reptiles, mammals, and birds. Extant vertebrates range in size from the carp species Paedocypris, at as little as 7.9 mm (0.3 inch), to the Blue Whale, at up to 33 m (110 ft). Vertebrates make up about 5% of all described animal species; the rest are invertebrates, which lack backbones.
The vertebrates traditionally include the hagfish, which do not have proper vertebrae, though their closest living relatives, the lampreys, do have vertebrae.[3] For this reason, the vertebrate subphylum is sometimes referred to as "Craniata", as all members do possess a cranium.

løbehjul
promotional bags

kosovohp

Gender : Male
Locale : VN
Kapisanan : Binhi

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum