Phylum Mollusca

Phylum Mollusca is a phylum of Kingdom Animalia. The defining characteristics of Phylum Mollusca are open circulatory systems, has organs and tissues, and has a nervous system. The nervous system of organisms of Phyllum Mollusca have a "brain" called a ganglia. Digestion is extracellular, gastrovascular complete. Organisms of Phylum Mollusca are often marine, so, they have gills. They also have soft bodies that is sometimes accompanied by a shell. An example of an organism of Phylum Mollusca is Octopus vulgaris.

Octopus vugaris