Bullfrog Dissection

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Bullfrog Dissection

This project was supposed to act as an introduction to anatomy/physiology by obsrving the similarities and differences of Bullfrogs to humans

BullfrogDissectionSofia P Ramos and Cheyenne Corey DC Anat/Phys P4Aug 31st


The urinary system is where bodily waste is removed. In Bullfrogs, the large intestine acts a urinary system, part of the digestive system as well as a reproductive organ. The bladder is located just superior to the pelvis.



Skin (also known as the integumentary system) acts as a protective layer to all organisms. In frogs, skin is bare and hairless while humans have hair on their skin.

The digestive system is where food is processed in the body and nutrients are absorbed. In a bullfrog, food passes through the large intestine (better known as cloaca) to the anus because it also functions as a waste system. The small intestine id located lateral and inferior to the liver.


The respiratory system is what makes animals breathe. It consists mainly of the lungs which exchange CO2 for Oxygen. The lungs are contralateral to the heart.


The reproductive system is how a species continues to live. In female bullfrogs, eggs are held in ovarian sacs by the 10,000s. In males, the testes are attached to the kidney. In frogs, the large intestine also acts as a reproductive organ. Eggs that are ready to be laid are inferior to allmost all other organs.


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Frog skin is bare and is equipped for both water and land living.Similar to human = protective layerDifference = hairless

The picture shows the inside of a bullfrogs mouth. The skull of a bullfrog as two rows of teeth, the maximillary and the vomerine (which are only two teeth.)Similar to human = extremities have similar structureDifference = no ribs or neck

The skeletal system is the framework of the body.

The eggs of a female bullfrog are shown on the photo to the left.Similar to human = eggs stored in ovarian sacsDifference = eggs held inside to lay all at once

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The large intestine attaches to the bladder with leads directly to the anus.Similar to human = bladder holds wasteDifference = one exit for waste

Food enters the stomach and travels through the small and large intestines to bladder.Similar to human = food undergoes the same processDifference, the large intestine wraps around the small

The lungs exchange oxygen and carbon dioxide through a filtering system.Similar to human = lungs contralateral to heartDifference = lungs inferior to the liver


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