Classification of Phylum Chordata
Biology

Classification of Phylum Chordata

This phylum derives its name from one of the common characteristics of this group namely the notochord (Gr. noton, back + L. chorda, cord). The…
Diversity of Chordates
Biology

Diversity of Chordates

The chordates exhibit an astonishing diversity in form, physiology and habits. The number of chordate species is limited. About 49,000 species are on record which…
Phylum Nematoda and their Characteristies
Biology

Phylum Nematoda and their Characteristies

Phylum Nematoda are the popular round worms. The body is narrow and pointed at both the ends. There are no body segments. The body is covered…
Phylum Annelida
Biology

Phylum Annelida

Phylum Annelida are worm like animals. The body segments are rings externally. Internally the segments are seperated by septa. Externally the body is protected by a…
Phylum Arthropoda and their Classes
Biology

Phylum Arthropoda and their Classes

Phylum Arthropoda are the most successful group of animals. They outnumber all other animals in population strength. The body is segmented. It is covered by a…
Phylum Mollusca and their Classes
Biology

Phylum Mollusca and their Classes

Phylum Mollusca is a very successful and diverse group of animals. Considered to be the second largest group of animals with regard to species number. These…
Phylum Echinodermata and their Classes
Biology

Phylum Echinodermata and their Classes

Phylum Echinodermata are marine organisms. While the adults are radially symmetrical the larvae remain bilaterally symmetrical. The mouth is on the lower surface. The Echinodermata is…
Phylum Platyhelminthes and Their Classes
Biology

Phylum Platyhelminthes and Their Classes

Platyhelminthes phylum includes flatworms. These are acoelomates, without a body cavity called coelom. The alimentary canal is either absent or very simple. Excretion and osmoregulation occur…
Phylum Coelenterata or Cnidaria
Biology

Phylum Coelenterata or Cnidaria

All coelenterates are aquatic animals. They are mostly marine. The body is radially symmetrical. The body wall is of two layers of cells. The outer…
Major Phyla Phylum: Protozoa and Porifera
Biology

Major Phyla Phylum: Protozoa and Porifera

Phylum : Protozoa This phylum includes a great diversity of small, microscopic organ-isms. These are single celled eukaryotes. Protozoa are one-celled animals found worldwide in…
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