buy lipitor online
buy lipitor online
|
|-- | |-- | `--+-- | `-- `--+-- `--+-- `-- |-- `--buy lipitor online |
buy lipitor online
Generally mention the word "animal" and most people think of a vertebrate animal -- and more particularly a higher vertebrate, especially a mammal. Vertebrates are large enough for people to relate to, and most like us in appearance and structure. In addition we ourselves are vertebrates, which lends a certain interest to the group.
For all these reasons Vertebrates are distinguished from all other members of the , which are in contrast, considered "bugs", "worms", etc. Significantly, when was formulating his systematisation of the animal kingdom, four of his six -- mammals, birds, amphibia (including reptiles) and fish -- were vertebrates.
Vertebrates are animals with a backbone. They differ from other in that they possess at least some rudiments of a or backbone instead of (or in addition to) a . There is a well developed , with the brain encased in a or . Most vertebrates have an elaborate internal that acts as a support for and organs. The advantage of an internal skeleton is that it allows the animal to grow much larger than is the case with the arthropod-type .
All vertebrates have a single heart and closed . They also possess ductless that play a critical role in regulating the body . In their circulatory, excretory, and endocrine functions, vertebrates differ markedly from other animals.
The vertebrate has proved extraordinarily successful. Since their first humble beginnings in seas, the Vertebrates have conquered the land, sea, and air. Thre are more than 57,000 living , and who knows how many extinct forms that have lived and died in past ages.
buy lipitor online | |
:
|
`-- buy lipitor online |?- †|?- †|-- `--+-- `--+-- `--+-- `== |--+-- | |-- | `-- `-- |-- |-- `-- |-- `-- `-- `-- |-- `-- |
|
buy lipitor online
MAK010430, this page MAK060924