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Class Amphibians



CLASSIFICATION OF ANIMALS AND ORGANIZATION OF LIFE THE VERTEBRATES (PHYLUM CHORDATA) All vertebrates have the following features: A bilaterally symmetrical body which is divided into a head, trunk and a tail with a neck joining the head to the trunk in most vertebrates. An internal skeleton (endoskeleton) Well developed central nervous system and sense organs. A closed blood system Skin covered with scales, feather or hair. The phylum chordata (animals with notochord) can be subdivided into five classes. Thee include   Class Pisces (tilapia, shark, dogfish) These are fishes which are aquatic, cold blooded (poikilothermic) i.e. the body temperature varies with that of the surrounding). Their bodies are covered with scales. They breathe through their gills Fertilization is external They posses fins for locomotion Their bodies are streamlined in shape   Class Amphibians (toad, frog, newt) They are cold blooded animals. They spend most of their time on land but… Read More »CLASSIFICATION OF ANIMALS AND ORGANIZATION OF LIFE

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