Structural Organisation in Animals (Frog)

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Rana tigrina belongs to Phylum Chordata, Subphylum Vertebrata, Superclass Tetrapoda, Class Amphibia, Order Anura, Genus Rana, and Species tigrina. It is the common Indian bull frog.

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A frog is amphibious because it can live both on land and in freshwater. It cannot survive in brackish or saltwater conditions. Its life depends on water for breeding and early development.

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The frog body is moderate in size, about 12 to 20 cm long, spindle-shaped, dorsoventrally flattened, and streamlined. It has a head and trunk, but no neck and no tail in the adult stage. The skin is t…

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Frog skin is thin, smooth, moist, and slippery because of mucus secreted by mucous glands. This skin helps in respiration and water absorption. The frog never drinks water; it absorbs water through th…

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Camouflage is the ability of a frog to change body colour to hide from enemies. The dorsal side is generally olive green with dark spots, while the ventral side is uniformly pale yellow.

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Frogs are cold-blooded animals, so body temperature changes with the environment. During extreme heat and cold, they take shelter in deep burrows. This is called summer sleep or aestivation in heat an…

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On land, a frog moves by hopping and leaping. At rest, the long hind limbs remain folded in the form of the letter Z. In water, the hind limbs move alternately and the webbed toes push water backward …

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Frogs are carnivorous and feed on live earthworms, snails, insects, spiders, fishes, and small frogs. Prey is captured by a long, extensible, sticky tongue that flicks out quickly and pulls the prey i…