![]() ![]() Head – the anterior end of the frog extending to and including the eardrums mouth – the large opening at the anterior end of the head made up of a maxilla and mandible maxilla – the upper jaw bone mandible – the lower jaw bone external nares (i.e. Use these descriptions and the picture to identify each of the following external structures.Ī. More quick links for review are available at. If you are not participating in the real frog dissection, please use the virtual frog dissection at: to complete this worksheet. Domain _ Kingdom _ Phylum _ Class _ Order _ Family _ Genus _ Species _ As you do the frog dissection, complete this worksheet. Find the following classifications for the grass frog. Why don’t most amphibians live or use ocean environments? _ _ _ _ 5. Toads in southeast Alaska have been observed swimming in the ocean, though they don’t live there. Of the thousands of amphibians discovered, only one lives in the ocean. If amphibians have lungs, why do they also breathe through their skin? _ 4. ![]() How are amphibians adapted for terrestrial life? _ 3. How are amphibians adapted for aquatic life? _ 2. Its specific function (if applicable) Pre-lab Questions 1. ![]() How it is connected with other components.Therefore, for every structure seen, you should determine the following: Their specific layout within the body contributes to making certain functions possible. Structural parts are not "just there" in random locations. As the second leading theme, pay particular attention to the relationships among organs and groups of organs. As the leading theme of this lab, ask yourself: for every structure observed in the frog, there is an equivalent structure in your own body - what is the structure and where is it located. In a way, studying the frog is like studying a human. The similarity of structures among related organisms shows evidence of common ancestry. The frog is a vertebrate, which means that many aspects of its structural organization are common with all other vertebrates, including man. You will notice various incisions on the external surface of the frog where the latex was injected. Double injected refers to the arteries being filled with a red latex, and the veins being filled with blue latex. Urogenital System The specimen you will receive is a preserved double-injected specimen.In addition to the external anatomy of the frog, we will emphasize three systems. Make sure to look at one of the opposite sex. Compare you dissection with others, for animals often differ. Remember, this is a learning experience, it is quite permissible to discuss and observe other students' specimens. ![]() If after an earnest effort, you cannot find a structure, ask for assistance. Using the available material, instructions and diagrams, most students will be able to locate most structures for themselves. We will be using the grass frog (Rana pipiens) that is smaller than the bullfrog (Rana catesbeiana). Dissection of the Grass Frog Names _ _ _ _ Introduction In this laboratory exercise, the anatomy of the grass frog will be examined in some detail. ![]()
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