Phylum Arthropoda Introduction || General Characteristics

Phylum Mollusca Introduction || General Characteristics and Classification

Phylum Hemichordata Introduction || General Characteristics OF Balanoglossus || Differences Between Nonchordates and Chordates

Phylum Echinodermata Introduction || General Characteristics and Classification

Phylum Coelenterata Classification || Phylum Ctenophora Introduction ||General Characters and Classification

Phylum Aschelminthes (Nemathelminthes) Introduction || General Characteristics and Classification

Phylum Coelenterata Introduction || General Characters Polyp OF Hydra or Medusa OF Aurelia

Phylum Protozoa Introduction And General Characters || Classification || Distinguishing Features OF Flagellated Protozoans || Amoeboid Protozoans || Sporozoans || Ciliated Protozoans

Phylum chordata Introduction || Characteristic Features and Classification

Phylum Annelida Introduction || Characteristics and Classification || Some Important Annelida

Phylum platyhelminthes Introduction || Characteristics and Classification