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.

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

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.

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.

Nictitating membrane

image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html

NO CLAWS

image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html

What sex is it?

Images from: http://sps.k12.ar.us/massengale/frog_dissection.htm

TONGUE attached at front not back like yours!

Imagse from: http://www.animationlibrary.comhttp://www.geocities.com/animalbio/biology.htm

image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html

MuscularBack of throatPulls food into digestive system

image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html

Connect earsto back of throat

image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html

GLOTTISOpening torespiratory

GULLETOpening to digestive

Images from: http://sps.k12.ar.us/massengale/frog_dissection.htm

Image from; http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20 Laboratory/frog%20dissection/frog%20dissection_files/frame.htm

Image from: http://step.sdsc.edu/projects95/Frog.Dissection/index.html

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

SPLEEN

Produces and stores new RBC’s and processes old worn out ones

Mesentery holds intestines together

image from: http://www.manheimcentral.org/~tw005690/Frog/frog.htm

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

TESTES MAKE SPERM

http://step.sdsc.edu/projects95/Frog.Dissection/index.html

TESTES KIDNEY

BRAIN

http://www.manheimcentral.org/~tw005690/Frog/frog.htm