FROG DISSECTION
http://www.aa.psu.edu/biology/frog/default.htm
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
I.) External Anatomy
a.) Eyes
b.) Nictitating Membrane
c.) Tympanum
d.) External Nares
e.) Appendages
II.) Mouth
a.) Internal Nares
b.) Tongue
c.) Eustachian Tube
d.) Maxillary and Vomerine Teeth
e.) Glottis
f.) Esophagus
III.) Setup for the Dissection
a.) Pinning the Frog
b.) Skin incisions
c.) Muscle incisions
IV.) Respiratory System and Liver
a.) Vocal Cords
b.) Lungs
c.) Liver
d.) Gallbladder
V.) Circulatory System
a.) Heart
b.) Left Atrium
c) Right Atrium
d.) Ventricle
VI.) Digestive System
a.) Esophagus
b.) Stomach
c.) Small intestine
d.) Cloaca
e.) Anus
f.) Pancreas
g.) Spleen
h.) Fat Bodies
VII.) Urogential System
a.) Kidneys
b.) Urinary Bladder
VIII.) Male Anatomy
a.) Testes
b.) Fat Bodies
IX.) Female Anatomy
a.) Ovaries
b.) Oviducts
X.) Cleanup
a.) Disposal of frog
b.) Clean equipment
1. Dispose of all frog parts properly in the container marked
Animal Waste.
2. Do not leave any of the parts in the trash cans or sink.
3. Rinse and dry all equipment used, including the dissecting
pan.