FROG DISSECTION

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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 frogs 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, contd

• This seems like an advantage, but it also lets
  them absorb toxins that makes them a miners
  canary for changes in the environment. Frogs
  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 weve
  had with a brain.

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Nictitating membrane
image from http//www.spc.cc.tx.us/biology/jmckin
ney/Studyimages/frog/frogdissectlist.html
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• NO CLAWS

image from http//www.spc.cc.tx.us/biology/jmckin
ney/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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Imagse from http//www.animationlibrary.com http
//www.geocities.com/animalbio/biology.htm

• TONGUE attached at front not back like yours!

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Muscular Back of throat Pulls food into
digestive system

• image from http//www.spc.cc.tx.us/biology/jmcki
  nney/Studyimages/frog/frogdissectlist.html

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image from http//www.spc.cc.tx.us/biology/jmckin
ney/Studyimages/frog/frogdissectlist.html
Connect ears to back of throat
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image from http//www.spc.cc.tx.us/biology/jmckin
ney/Studyimages/frog/frogdissectlist.html
GLOTTIS Opening to respiratory
GULLET Opening to digestive
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Images from http//sps.k12.ar.us/masseng
ale/frog_dissection.htm
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Image from http//faculty.clintoncc.suny.edu/facu
lty/Michael.Gregory/files/Bio20102/Bio2010220
Laboratory/frog20dissection/frog
20dissection_files/frame.htm
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Image from http//step.sdsc.edu/projects95/Fr
og.Dissection/index.html
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Image from http//faculty.clintoncc.suny.edu/facu
lty/Michael.Gregory/files/Bio20102/Bio2010220
Laboratory/frog20dissection/frog
20dissection_files/frame.htm
Females may have black white eggs
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SPLEEN

• Produces and stores new RBCs and processes old
  worn out ones

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image from http//www.manheimcentral.org/tw00569
0/Frog/frog.htm

• Mesentery holds intestines together

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KIDNEYS- Remove nitrogen waste from blood and
dilute it with water to make urine osmoregulation
Image from http//step.sdsc.edu/projects95/Fr
og.Dissection/index.html
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TESTES
MAKE SPERM
http//step.sdsc.edu/projects95/Frog.Dissection/in
dex.html
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TESTES KIDNEY
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BRAIN
http//www.manheimcentral.org/tw005690/Frog/frog.
htm