Frog Anatomy and morphology


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Frog Anatomy and morphology

  1. 1. <ul><li>&quot;Amphibian” comes from the Greek meaning &quot;both life&quot;. Amphibians can live on water and on land. </li></ul><ul><li>Scientist infer that amphibians evolved from lobe-finned fishes called crossopterygians. </li></ul>
  2. 3. FROG <ul><li> LATIN meaning </li></ul><ul><li>KINGDOM _____________ </li></ul><ul><li>PHYLUM ____________________________ </li></ul><ul><li>SUBPHYLUM ___________________________ </li></ul><ul><li>CLASS _______________________________ </li></ul><ul><li>ORDER _____________________________ </li></ul>ANIMALIA CHORDATA VERTEBRATA “backbone” AMPHIBIA “double life” ANURA “without a tail”
  3. 4. Characteristics of Frog
  4. 5. Frogs are cold-blooded, which means their blood temperature rises and falls with that of the surrounding environment <ul><li>• </li></ul>
  5. 6. They use gills, lungs, skin, and mouth cavity in respiration.
  6. 7. They have moist, smooth, thin skin with no scales.Feet are webbed and the toes lack claws .
  7. 8. Frogs have many prominent characteristics that are adaptations to a life spent both on land and in water: They change from an aquatic larval stage to a terrestrial adult form. This transformation is called metamorphosis
  8. 9. <ul><li>Frogs enter a state of dormancy when conditions are unfavorable. They often bury themselves in mud or leaves, emerging when conditions are better. </li></ul>
  9. 10. Such states of inactivity are known as known as: <ul><li>Hibernation when it occurs in the winter </li></ul><ul><li>Estivation when it occurs in the summer </li></ul>
  10. 11. HIBERNATION/ ESTIVATION Images from: FAT stored in FAT BODIES provides energy
  11. 12. Thin, moist skin – no scales Mucous glands make it “slimy” Camouflage- for protection Some have poison glands
  12. 13. Larvae have two-chambered hearts; adults have three-chambered hearts and well-developed circulation.
  13. 14. Eggs lack multicellular membranes or shells. They are usually laid in water or in a moist environment and fertilized externally.
  14. 15. Classification of Amphibians
  15. 16. Frogs and toads comprise the order Anura There are about 3,500 known species of frogs and 300 kinds of toads They are found on every continent except Antarctica