Frog - Dissection

"We are tied to the ocean. And when we go back to the sea, whether it is to sail or to watch - we are going back from whence we came."

- John F. Kennedy

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FROGGER's FINAL HOURS

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Patient #001879: Jones, Frogger

Specimen: Grass Frog
Height: 8.5 inches
Eye Color: BLK
Weight: 10 Oz
Ethnicity: Amphibian

  Biography: Frog's are found in creeks, ponds, swamps,trees, and rain forests. They are found on every continent except Antarctica. They are able to live in cold and hot climates. They eat flies, mosquitoes, moths, and dragonflies. The larger frogs are likely to eat grasshoppers, worms, and even smaller frogs. Frogs use their skin, lung, and the lining of their mouths to breathe. The skin membrane allows a diffusion of oxygen. It can also breath by taking air through its nostrils and down through its lungs. Surprisingly, they do not have a diaphragm. The lining of the mouth method of respiration is similar to the skin respiration because of gas exchange. It usually is the predominant form of breathing while the frog is at rest. Fun fact: When a frog completely sheds its skin, it eats it within a week.

REFER TO THE INFORMATIONAL DISSECTION VIDEO AT THE BOTTOM IF KNOWING HOW TO DISSECT THIS ORGANISM IS DESIRED. THE VIDEO CONTAINS A DETAILED VISUAL AND VOICEOVER.

DISSECTION INSTRUCTIONS



First, flip the frog on its back so that the stomach is exposed. Then, using a scalpel, lightly trace over the incision lines shown in the picture. I would suggest not cutting deep because the frog's organs are close to the surface of the skin, and not covered by much muscle. Once you have a traced incision, use scissors to cut through any skin and muscle-coverage to expose the frog's organs. 

INFORMATIONAL DISSECTION VIDEO ABOVE

It's What Matters on the Inside

Esophagus: Tube that connects the mouth and stomach
Stomach: Stores food and mixes it with enzymes to begin digestion
Small intestine: Posterior organ of digestive system which stores undigested food
Lungs: Aid in respiration
Heart: Pumping organ of the circulatory system

Can't forget about the Outside

Anus: Part of  the frog that allows for excretion of wastes

Toes: Webbed, helps them to swim

Hind limb: The "legs" of the frog, used in jumping movement

Trunk: The body of the frog, stores all the organs of the frog

Brow Spot: Is used to tell if the skull of the frog is fully developed

Ear Drum: Allows them to hear around their environment

Nostrils: Opening for air to enter and exit

Thigh: Part of the hind-limb of the leg

Eye: Part of the frog that allows it to see, covered by a membrane that cleans and protects it

In this picture, the frog's brain is exposed. This contains the parts such as the Cerebellum, Cerebrum, Optic lobe, Olfactory lobe and the medulla oblongata. The medulla connects the brain with the spinal cord. The spinal cord is seen in the picture below.

This is the frog's spinal cord after you have removed all of the internal organs that it contains.