Frog Dissection Scientists believe other vertebrates evolved from
Frog Dissection
Scientists believe other vertebrates evolved from BONY LOBE-FINNED fish
AMPHIBIAN CHARACTERISTICS Moist, thin skin without scales Aquatic larva changes to terrestrial adult Feet without claws Respiration with gills, lungs, skin, mouth Closed 2 loop circulation External fertilization Ectothermic (cold blooded) Eggs without shells or multicellular membranes
FROG LATIN meaning ANIMALIA KINGDOM _______ PHYLUM ______________ CHORDATA VERTEBRATA “backbone” SUBPHYLUM ______________ AMPHIBIA “double life” CLASS ________________ ANURA “without a tail” ORDER _______________
Thin, moist skin – no scales Mucous glands make it “slimy” Camouflage- for protection
BREATHING THROUGH SKIN is called CUTANEOUS RESPIRATION
HIBERNATION/ ESTIVATION FAT BODIES provide energy Images from: http: //www. enc. org/Classroom_Calendar/CC_Units/Unit_Images/185. jpg http: //www. reptilis. org/pyxi/image 5. htm
Larvae breathe with GILLS
Nictitating membrane image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html
NO CLAWS image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html
EXIT OPENINGS DIGESTIVE WASTE (feces) = _________ ANUS Shared EXCRETORY & REPRODUCTIVE EXIT = _______________ UROGENITAL PORE (Urine & eggs or Urine & sperm)
EXIT OPENINGS OPENING SHARED BY EXCRETORY, REPRODUCTIVE, & DIGESTIVE = _______ VENT
What sex is it? Images from: http: //sps. k 12. ar. us/massengale/frog_dissection. htm
Image from: http: //www. animationlibrary. com TONGUE attached at front not back like yours!
image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html
image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html
image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html
Images from: http: //sps. k 12. ar. us/massengale/frog_dissection. htm
Image from; http: //faculty. clintoncc. suny. edu/faculty/Michael. Gregory/files/Bio%20102%20 Laboratory/frog%20 dissection_files/frame. htm
Image from; http: //faculty. clintoncc. suny. edu/faculty/Michael. Gregory/files/Bio%20102%20 Laboratory/frog%20 dissection_files/frame. htm Females may have black & white eggs
image from: http: //www. spc. cc. tx. us/biology/jmckinney/Studyimages/frogdissectlist. html Pericardial membrane around heart Mesentery holds intestines together
Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
Gall Bladder Image from: http: //school. discovery. com/quizzes 6/muskopf/frog. html
PANCREAS
Pancreas (enlarged)
SPLEEN
DUODENUM ILEUM
Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
10 Body Systems : __________ EXCRETORY Get rid of nitrogen waste made by cells Nitrogen waste has different chemical forms: AMMONIA ______ UREA _____ URIC ACID _______ MOST TOXIC made from ammonia by liver HUMANS AMPHIBIANS LEAST TOXIC needs the least water to dilute BIRDS, REPTILES FISH
ALL WASTE is NOT THE SAME! DIGESTIVE wasteleft over from undigested food travels through digestive system leaves through digestive system as feces EXCRETORY waste(Also called NITROGEN WASTE) made by cells from break down of proteins travels through blood stream leaves through excretory system as ammonia, urea, or uric acid
CLOACA DIGESTIVE EXCRETORY REPRODUCTIVE
URINARY BLADDER
Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
BREATHING WITH LUNGS is called PULMONARY RESPIRATION
FAT BODIES Ectothermic (Cold blooded) Hibernation Estivation Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
OVARIES Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
Image from: http: //step. sdsc. edu/projects 95/Frog. Dissection/index. html
TESTES
TESTES KIDNEY
AMPLEXUS “firm embrace”
INDIRECT DEVELOPMENT
HEART 3 chambered heart Right atrium Left atrium Ventricle Image from: http: //www. digitalfrog. com/resources/froggallery. html
Other vertebrates have nuclei in their RBC’s Human RBC image from: http: //www. nigms. nih. gov/moleculestomeds/images/bloodcells. gif RBCs’ image from: http: //www. fish-news. com/RG 4001. jpg
Sinus venosus Atrium BODY organs GILLS Ventricle Conus arteriosus FISH CIRCULATION
Sinus venosus RIGHT LEFT Lungs Atrium Ventricle Body organs Conus arteriosus FROG CIRCULATION
Sinus venosus RIGHT LEFT Lungs Atrium Ventricle Body organs Conus arteriosus FROG CIRCULATION
Ways tadpoles are like fish Have a LATERAL LINE Breathe with gills Excrete nitrogen waste as AMMONIA (with gills & kidneys) Have a 2 chamber heart
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