frog dissection purpose: the purpose of this lab activity is to help you learn the anatomy of a frog...
TRANSCRIPT
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FROG DISSECTION• Purpose:
The purpose of this lab activity is to help you learn the anatomy of a frog and give you a better understanding of the anatomy of vertebrate animals in general, including humans.
• After completing this dissection, you should be able to: 1.)Correctly identify the locations involved in the dissection procedures, and 2.)Correctly identify the locations of the major organs within the body cavity of a frog.
• Materials: Preserved frog Dissection Pan Dissection kit Scalpel Forceps Scissors Dissecting Pins Probes
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Introduction:
In this lab we will be dissecting a frog to study the frog’s internal organs to develop dissection technique and to observe organ systems of a representative vertebrate. Frogs are interesting because they live both in and out of water. They also play a big part in ecosystem evaluation. Since their skin is so moist and they absorb things, they have the ability to absorb nutrients from their environments.
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Introduction, cont’d
This seems like an advantage, but it also lets them absorb toxins that makes them a miner’s canary for changes in the environment. Frog’s are also the first vertebrates we will be dissecting, and I anticipate that they will be more interesting than the starfish and clams since they have more developed internal systems like nervous, digestive and respiratory systems. They are also the first dissection subject we’ve had with a brain.
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Nictitating membrane
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
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NO CLAWS
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
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What sex is it?
Images from: http://sps.k12.ar.us/massengale/frog_dissection.htm
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TONGUE attached at front not back like yours!
Imagse from: http://www.animationlibrary.comhttp://www.geocities.com/animalbio/biology.htm
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image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
MuscularBack of throatPulls food into digestive system
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image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
Connect earsto back of throat
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image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
GLOTTISOpening torespiratory
GULLETOpening to digestive
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Images from: http://sps.k12.ar.us/massengale/frog_dissection.htm
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Image from; http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20 Laboratory/frog%20dissection/frog%20dissection_files/frame.htm
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Image from: http://step.sdsc.edu/projects95/Frog.Dissection/index.html
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Females may have black & white eggs
Image from; http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20 Laboratory/frog%20dissection/frog%20dissection_files/frame.htm
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SPLEEN
Produces and stores new RBC’s and processes old worn out ones
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Mesentery holds intestines together
image from: http://www.manheimcentral.org/~tw005690/Frog/frog.htm
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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
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TESTES MAKE SPERM
http://step.sdsc.edu/projects95/Frog.Dissection/index.html
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TESTES KIDNEY
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BRAIN
http://www.manheimcentral.org/~tw005690/Frog/frog.htm