Frog Dissection

for Biology 110

Penn State Altoona Biology
Penn State Altoona
3000 Ivyside Park
Altoona, PA 16601-3760


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.


Preserved frog

Dissection Pan

Dissection kit
Dissecting Pins

Table of Contents:

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

Return to Penn State Altoona Biology Home Page