marine animals  |
|
|
| |
|
| Chordata (Chordatiere) Chordates |
The most typical and eponymous feature of the chordates (about 48 600 species) is the - notochord -, an elastic Achsenstab running beneath the spinal cord.
Even in the higher vertebrates, the notochord is replaced by the vertebral bodies.
The original live as chordates, so are the gill slits of the foregut perforations as a characteristic feature, which itself occurs in mammals still in the embryonic development.
In the similar consideration of the development of the various germs chordates, the common basic plan of all members of this tribe is recognized. |
| |
root  |
Chordata (Chordatiere) Chordates |
| class |
|
| |
Hotel search!
