Morphology of frog?

1.	Morphology of frog?
Answer» Common frog we can take Rana tigris comes in class Amphibians. Frog does not have scales and as smooth moist skin. It can breathe through skin, lungs and Buccal Cavity. In tadpoles, respiration takes place through gills. They have nictiating membrane for clear vision in water. They do not have copulatory organ, but has copulatory pads for catching female will copulation. They are poikilotherms or cold blooded. They have a roughly triangular head. Body is divided into head and trunk. They have bilobed tongue for catching prey and can only catch if prey is in motion. They have mesonephric kidney. They 3 chambered heart, two atria and one ventricle. They show mimicry, hibernation ( winter sleep), aestivation ( summer sleep). They have internal fertilization and indirect development. Closed circulatory system and complete digestive system, which ends in cloaca. They are ureotelic but tadpoles are aminotelic. Feeds on insects mostly and have digestive juices, intestinal juices but salivary system is absent.

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