Question

explain sub phylum vertebrata

Answer 1

The vertebrates are separated from the rest of the chordates by a number of characteristics. The most important of these is possession of a set of vertebrae, hollow structures which combine to make the spinal column. These are either made of cartilage or of bone and cartilage combined. This surrounds and protects the central nerve cord and replaces the notochord as an axial support for muscles. The anterior (front) end of the nerve cord is enlarged into a brain which typically consists of five vesicles. This brain in turn is normally encased in a protective structure called the cranium.

Answer 2

Vertebrate, also called Craniata, any animal of the subphylum Vertebrata, the predominant subphylum of the phylum Chordata. They have backbones, from which they derive their name.

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