Kingdom Animalia

Kingdom Animalia is one of the two original kingdoms of classification and is a kingdom of Domain Eukarya. This Kingdom has 9 phyla: Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, and Chordata. Digestion can be intracellular or extracellular. Extracellular digestion depends on the classification of the organism into a phylum to determine if it is gastrovascular complete or gastrovascular incomplete. Organisms of Kingdom Animalia are multicellular. Organisms of Kingdom Animalia reproduce sexually. Some organisms of Kingdom Animalia lack circulatory systems, some have open circulatory systems, and others have closed circulatory systems. The respiratory systems of organisms of Kingdom Animalia differ, and can often be found by the phylum they are classified under. Organisms of Kingdom Animalia are hetertrophic. The nervous systems of organisms of Kingdom Animalia vary from phylum to phylum. The defining characteristic of Kingdom Animalia is that organisms of Kingdom Animalia can move at quicker rates than those of other organisms of other Kingdoms. Examples of organisms classified under Kingdom Animalia are Tyto alba and Strongylocentrotus purpuratus.

Strongylocentrotus purpuratus

Tyto alba