Bilaterians
Bilaterally symmetrical animals (bilateria) with radial symmetry animals (radiata) together constitute the true metazoans (eumetazoa)
Classification
Domain: eukaryotic domains (eukarya)
Sector: the animal kingdom (animalia)
Sub-sector: true metazoans (eumetazoa)
Bilaterally symmetrical animals (bilateria)
Total gate
Deuterostomes (deuterostomia)
Haraguchi animals (protostomia)
Molt animals (ecdysozoa)
Crown wheel Animal (lophotrochozoa)
Other doors
Jaw stomach phylum (chaetognatha)
Platyhelminthes door (platyhelminthes)
Anatomical structure:
Bilaterally symmetrical animal's body developed from the three germ layers, that have mesoderm. Three embryonic germ layer is made of two layers evolved. It is bilaterally symmetrical animals, advanced animal than actinomorphic.
As the name suggests they were on both sides of the body symmetrically. In front trunk begins to form the brain (cephalisation). Circular muscle of certain types of software (where the trunk contraction causes narrowing) the outer, longitudinal muscle (contraction leading to their recovery trunk) included. Most of them have long intestines and blood system. In the skin (epidermis) and the body cavity between the intestine (coelom), it will be filled with internal body fluids, the formation of hydrostatic pressure to maintain its shape. If there is blood, the animal's kidneys and excreted through the kidney after the original completion.
They have three cleavage method: Spiral (Haraguchi animal protostomia), radiation (deuterostomes deuterostomia) and bilaterally symmetrical (Haraguchi animals, deuterostomes). |
Protostomia