Bullfrog Lab

Words: 1023
Pages: 5
Open Document
It is said that the diet of animals can have an effect on the length of their intestines. The American bullfrog has the largest range of any North American amphibian, and is reported to be native across most of the United States east of the Rocky Mountains to Nova Scotia and northeastern Mexico (Orz-Serrato et al. 2014). The X-rays are available in a variety of formats. This statement shows that since the American bullfrog has such a large range, then the range of food is also very large. A bullfrog's diet ranges from worms, insects, crayfish, fishes, other frogs, snakes, turtles, small mammals and even some birds, therefore this diet insinuates towards being carnivorous. There is another vertebra that is found in various places around the …show more content…
Firstly, the bullfrog was placed on the dissection tray dorsal-side down and the snout to vent length was measured in centimeters with the meter stick. The frog was then cut down the stomach and then after the skin of the abdomen was cut horizontally, 2 vertical cuts were made at the top and the bottom of the horizontal cut to create flaps to access the small intestine easier. The flaps of the adornment were pulled and pinned back so as not to get in the way. Then, without cutting the other organs in the frog or the mesentery that loosely holds the coils of the small intestine together. After the small intestines were cut out, the mesentery tissue was removed from the intestines to make sure that accurate measurements could be made. Finally, once the small intestine coils were freed, the measurement was taken by holding the intestine straight against the meter stick and the measurements were recorded in centimeters. The bullfrog was put aside, and the preserved pig was placed on the dissection tray, dorsal side down. The string was used to pull the front and hind legs apart so they don’t get in the way of the measurement and the dissection. The pig was measured from snout to vent and the measurement was recorded in centimeters. The same three incisions were made on the pig’s abdomen, and …show more content…
The one-tailed p-value for the experiment was. 1.74" x 7.5" x 7.5" This value is less than 0.05, meaning there is a significant difference. Therefore, the null hypothesis is rejected. There is enough evidence to support the alternative hypothesis, therefore we can conclude that the bullfrog has a shorter small intestine than the fetal pig. American bullfrog’s are known for their high protein diet and little to no vegetation, which indicates that bullfrog’s have a smaller digestive tract. Since vegetation is harder to digest, this indicates that herbivores have a longer digestive tract. This experiment allowed us to see that the intestine length of carnivores is shorter than the intestine length of omnivores. One thing about the experiment that could be changed is that we are using one mammal that is carnivorous and one mammal that is herbivorous so we can see the differences in animals that are in the same class.

Literature Cited D. Frémondeau, T. Cucchi, F. Casabianca, J. Ughetto-Monfrin, M.-P. Horard-Herbin, M. Balasse, Seasonality of birth and diet of pigs from stable isotope analyses of tooth enamel (18O, 13C): a modern reference data set from Corsica, France, Journal of Archaeological Science, Volume 39, Issue 7, 2012, Pages 2023-2035,
Show More

Related Documents: Bullfrog Lab

Animal Testing Research Paper

it would be medical students, and even then some medical schools don’t allow their students in animal labs. “Animal testing is an unreliable biomedical procedure since the anatomy and physiological of test animals is likely to be very different from that of humans” (Newton pg.73) They realize that for manual and surgical skills, operating room experience is far more appropriate than animal labs. Dissection alternatives are also environmentally benign. Alternatives are also cost-effective. Though…

Words 1177 - Pages 5

Essay about Water and Habitable Planet Unit

A.P. Environmental Science Syllabus 2009-2010 General scope and sequence for the course |Unit |Topic |Relevant Text Chapters | |1 |Sound Science, Stewardship and Sustainability |1, 22 | |2 |Ecosystems and Biogeochemical Cycles |2, 3, 4…

Words 4001 - Pages 17

Lab 9 Muscle PhysiologyBackgroundSarcomereThick FilamentsOverview Of Essay

Lab #9: Muscle Physiology Background Sarcomere Thick Filaments Overview of Skeletal Muscle Contraction Skeletal muscle fibers are very large, elongated cells (Fig 9.1). Roughly 80% of the content of each muscle fiber consists of long bundles of protein called myofibrils. The myofibrils, in turn, consist of two types of myofilament (Fig 9.2). One type of myofilament, called the thick filament, is composed of hundreds of molecules of a protein called myosin. The other type of myofilament, the thin…

Words 4186 - Pages 17