![]() Store the frog in the labeled Ziploc bag at the end of each dissection period. Never remove frogs/frog parts from the classroom. Always cut away from your body and away from others. It is sharp enough to cut through skin.ħ. ![]() Do not dissect the frog while holding it. Use the proper procedures described in the tutorial to pin the frog to the dissecting pan. Rinse the frog completely before dissection. Keep your hands covered with the plastic gloves at all times. Avoid contact with preservative chemicals. However, if you need to take a break or the odor is beginning to bother you, notify the teacher. The frog has been preserved with a safe chemical and the classroom windows will be cracked open to allow fresh air in the room. Contact lenses can hold chemicals in the eye(s) increasing the potential damage in the event of an accidental splashing of chemicals into the eye(s). ![]() Wear safety glasses while you are dissecting even if you wear glasses or contact lenses. Conduct yourself in a responsible and safe manner at all times during the dissection. In order to best use this opportunity to learn and show respect for the frog, wemust follow all directions that are given to us and follow all safety procedures.Digestive System: similar to humans- adult frogs are carnivores- frog has a large mouth with a tongue (attached at the front) used to captureinsects- has two sets of teeth (two on top, two below)- swallowing of prey aided by its eyes (pressure pushes insects down to stomach)- order of digestive system:1) mouth (2) pharynx (3) esophagus (4) stomach (5) small intestine (6) large intestine (7) cloaca (anus)- frogs have a liver and pancreas tooCirculatory System:- frogs are amphibians (thus, they are cold blooded)- frogs have arteries, veins, capillaries, heart, and blood- frog heart has 3 chambers: 2 atriums, 1 ventricle (human heart has 4 chambers: 2 of each)- this causes there to be some mixing of oxygenated and de-oxygenated bloodRespiratory System:- frogs exchange O2 and CO2 in their lungs, just like humans do- frogs have 2 lungs for gas exchange, and nostrils for breathing- O2 can also diffuse directly through the frog’s skin that is why their skin is moistDissection Safety Rules 1. The frogs gave their lives so that we can learn more about them and more aboutourselves. Computer simulated dissections will be used in this lab by individuals who choosenot to participate in the actual dissection. We still need to use gloves and wash our hands while working with preservedspecimens. The supply companies also use safe solutions to preserve thespecimens. The companies that provide frogs make sure that the frogs are not anendangered species. The frogs that we will use in our lab were bred for the scientific purpose of learninganatomy. We will make comparisons of the frogs’ anatomy to our own. We will be looking at each body system, and exploring individualorgans of the frog. Although all of theinternal organs are not the same in frogs and humans, it is helpful to learn about anatomythrough dissection. Frog Dissection Pre-labWhy dissect a frog? Frogs and humans are vertebrates with similar organ systems.
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