Frog anatomy
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Frog anatomy

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  • 1. trunk Head Eye Tail ? Neck ?
  • 2. Nictitating membrane image from: http://www.spc.cc.tx.us/biology/jmckinney/ Studyimages /frog/frogdissectlist.html
  • 3.
    • Forelimbs and Hind limbs help in swimming, walking, leaping and burrowing
    • Hind limbs ends in five digits and they are larger and muscular than fore limbs that end in four digits.
    • Feet have webbed digit that help in swimming.
    • Male frogs can be distinguished by the presence of sound producing vocal sacs and also a copulatory pad on the first digit of the fore limbs which are absent in female frogs
  • 4.
    • NO CLAWS
    image from: http://www.spc.cc.tx.us/biology/jmckinney/ Studyimages /frog/frogdissectlist.html
  • 5.  
  • 6.
    • Auricle (atrium)
    • Ventricle
    • Conus arteriosus
    • Lung
    • Liver
    • Gall bladder
    • Small intestine
    • Large intestine
    • Spleen
    • Kidney
    • Fat bodies
    • Urinary bladder
    • Adrenal gland
    • testis
    40 38 44 46 51 49 47 52 55 56 39 42 43 50
  • 7.
    • Pericardial membrane around heart
    • Mesentery holds intestines together
    image from: http://www.spc.cc.tx.us/biology/jmckinney/ Studyimages /frog/frogdissectlist.html
  • 8.  
  • 9. Digestive system
    • Alimentary canal and dig. Glands
    • Alimentary canal short– carnivorous
    • Mouth,Oesophagus, Intestine, Rectum, Cloacal, Aperture, Buccal cavity, Pharynx, Stomach.
  • 10. Diagrammatic Representation of Internal Organs of frog showing complete digestive system
  • 11.
    • Mouth
    • Buccal Cavity
    • Pharynx
    • Oesophagus
    • Stomach
    • Intestine
    • Rectum
    • Cloacal Aperture
  • 12. image from: http://www.spc.cc.tx.us/biology/jmckinney/ Studyimages /frog/frogdissectlist.html GLOTTIS Opening to respiratory GULLET Opening to digestive
  • 13.
    • STOMACH:
    • LIVER:
    • GALL BLADDER
    Make acid (HCl) and digestive enzymes Start digestion (grind up food ) Make bile(bile emulsifies fat) Store glycogen Store vitamins Process toxins (including nitrogen waste) for kidneys Store bile
  • 14. PANCREAS
  • 15. Pancreas (enlarged)
  • 16.
    • PANCREAS :- produces pancreatic juice
    Makes TRYPSIN , INSULIN, GLUCAGON TRYPSIN - breaks down proteins INSULIN - tells cells to store glucose from bloodstream as glycogen GLUCAGON - tells cells to release stored glucose to blood stream
  • 17. SPLEEN
    • Produces and stores new RBC’s and processes old worn out ones
  • 18.
    • SMALL INTESTINE
    • DUODENUM -first part of intestine
    • Receives trypsin and bile; finishes digestion
    • ILEUM
    • Absorbs nutrients
    • VILLI & MICROVILLI
    • Increase surface area
    http://neuromedia.neurobio.ucla.edu/campbell/epithelium/wp_images/107%20villi.jpg
  • 19.
    • LARGE INTESTINE
    • Removes water from digestive waste;
    • concentrates feces
    • Undigested waste move into rectum and pass out through cloaca
    http://www.flushing.k12.mi.us/srhigh/tippettl/biology/frog/largeintestine.html
  • 20.
    • BREATHING THROUGH SKIN is called CUTANEOUS RESPIRATION
    Respiratory System Acquatic Respiratory organ (Diffusion)
  • 21. LUNGS:- Pulmonary Respiration GAS EXCHANGE http://www.flushing.k12.mi.us/srhigh/tippettl/biology/frog/index.html http:// www.stclement.pvt.k12.il.us/studentWeb/science98/GarrittPatM/alveoli.gif On Land Buccal cavity skin and Lungs –Respiratory organs
  • 22. Larvae breathe with GILLS
  • 23. Circulatory System Well developed closed type It includes heart, blood vessels and blood Heart :- Muscular, three chambered covered by pericardium
  • 24. HEART
    • 3 chambered heart
    • Right atrium
    • Left atrium
    • Ventricle
    • Sinus Venosus
    • joins to right atrium
    • Ventricles opens to conus arteriosus
  • 25.
    • Images from: http://www2.volstate.edu/msd/BIO/1020/Lab7ChordateII.htm
    ADULT FROG: 3 chamber heart 2 loop system
  • 26. Sinus venosus RIGHTAtrium Vent ricle Con us arter iosus      Lungs Body organs LEFT Atrium          FROG CIRCULATION
  • 27. Portal Circulatory System
    • Hepatic portal system - Special venous connection between liver and intestine
    • Renal portal system - Between kidney and lower parts of the body
  • 28. MOST vertebrates have nuclei in their RBC’s MAMMALS DON’T Frog blood composed of Plama, RBC, WBC and plateletts
  • 29. Sinus venosus RIGHTAtrium Vent ricle Con us arter iosus      Lungs Body organs LEFT Atrium          FROG CIRCULATION
  • 30. 10 Body Systems :
    • ___________________
    • Get rid of nitrogen waste made by cells
    • Nitrogen waste has different chemical forms:
    • ___________ __________ _____________
    • MOST TOXIC made from LEAST TOXIC ammonia by needs the least liver water to dilute
    • FISH HUMANS BIRDS, REPTILES
    • AMPHIBIANS
    EXCRETORY AMMONIA UREA URIC ACID
  • 31. Image from: http://step.sdsc.edu/projects95/Frog.Dissection/index.html KIDNEYS- Remove nitrogen waste from blood and dilute it with water to make urine; osmoregulation
  • 32. URINARY BLADDER http://www.manheimcentral.org/~tw005690/Frog/frog.htm STORES URINE MADE BY KIDNEYS LARVAE (Tadpoles) Excrete AMMONIA like fish Adult frogs excrete UREA to conserve water
  • 33. CLOACA
    • DIGESTIVE
    • EXCRETORY
    • REPRODUCTIVE
  • 34.  
  • 35.  
  • 36.