FROG DISSECTION http://www.aa.psu.edu/biology/frog/default.htm Purpose: The purpose of this

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.