Frog Dissection Ppt

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Frog Dissection Ppt

  1. 1. Frog Anatomy Lab Ms. Polson Biology November 15, 2009
  2. 2. Frog Facts <ul><li>Classified as amphibians, Anura </li></ul><ul><li>Tadpoles: aquatic and herbivores </li></ul><ul><ul><li>gills </li></ul></ul><ul><li>Adults frogs: land or water, carnivores </li></ul><ul><ul><li>cutaneous respiration, lungs </li></ul></ul><ul><li>Camouflage </li></ul><ul><li>Brain less developed </li></ul><ul><li>Three chambered heart </li></ul>
  3. 3. Amphibians Provide Benefits to Humans 1. T he glands of some frog species contain 20- 30 chemical compounds used to produce antibiotics 2. Chemical in the skin can make a painkiller 200 times stronger than morphine 3. Some amphibians (like salamanders) can regrow their tails if bitten off by a predator. Researchers are trying to develop new ways to help humans who have lost limbs due to accidents or birth defects. 4 . Gastric brooding frog of Australia might provide answers for humans suffering from gastric ulcers
  4. 4. Frog Life Cycle
  5. 5. Sexing Frogs <ul><li>Determine sex: </li></ul><ul><ul><li>Look at hand digits on forelegs </li></ul></ul><ul><ul><li>Male </li></ul></ul><ul><ul><ul><li>thick pads on “thumbs” </li></ul></ul></ul><ul><ul><ul><li>usually smaller than females </li></ul></ul></ul><ul><ul><li>Female </li></ul></ul><ul><ul><ul><li>normally larger in size </li></ul></ul></ul>
  6. 6. Why Study Frogs? <ul><li>Similar to humans </li></ul><ul><ul><li>skin, bones, muscles and organs </li></ul></ul><ul><ul><li>skeletal system, nervous system, circulatory system, digestive system, urinary system, reproductive system </li></ul></ul><ul><li>Frog anatomy is much simpler </li></ul><ul><ul><li>no ribs or diaphragm </li></ul></ul>
  7. 7. Anatomy I Biologycorner.com
  8. 8. Anatomy II Biologycorner.com
  9. 9. Anatomy III Biologycorner.com
  10. 10. Dissection Tools <ul><li>Gloves (non-latex) </li></ul><ul><li>Dissecting tray </li></ul><ul><li>Scissors </li></ul><ul><li>Forceps </li></ul><ul><li>Ruler </li></ul><ul><li>Magnifying glass </li></ul><ul><li>Dissection pins </li></ul><ul><li>Dissection manual </li></ul><ul><li>Frog </li></ul>
  11. 11. Lab Safety <ul><li>You will wear goggles, gloves and apron throughout the dissection </li></ul><ul><li>Do not dissect specimen while holding it </li></ul><ul><li>Cut away from your body and away from other students </li></ul><ul><li>Never ingest specimens </li></ul><ul><li>Do not remove specimen parts from lab </li></ul><ul><li>All dissection parts will remain in the dissection tray at all times </li></ul><ul><li>Properly dispose of dissected materials </li></ul><ul><li>Keep work station clean at all times </li></ul><ul><li>Using aseptic techniques clean lab </li></ul><ul><li>bench at end of class </li></ul><ul><li>Wash hands after handling specimen </li></ul>

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