Cambarus sp. Freshwater crustaceans ideal for the study of basic characteristics of the Arthropod phylum-including a chitinous exoskeleton and jointed appendages. A sequential examination of the appendages illustrates their adaptation to specific functions and the principle of serial homology. Crayfish are internally injected with fixative in an extended position. All individuals measured from tip of tail (uropod) to base of antennae.Frustrated by dissection guides your students cannot understand? Enhance your preserved crayfish dissection with Flinn's detailed and easy-to-follow Dissection and Photo Guides. Flinn Dissection Guides were written for maximum comprehension by middle school and high school students. The consistent writing style and format allows students to compare anatomical structures across species. Simple diagrams that correlate with the stepwise instructions will help your concrete thinkers follow the path of each body system. Helpful hints such as approximate location or typical color are specified for hard-to-locate organs. Brightly colored Flinn Dissection Photo Guides were produced with middle school and high school students in mind! Created from photographs taken during actual dissections, these versatile guides will be tremendous tools for all of your students’ study of anatomy and zoology. Prominent anatomical features and organs are labeled to help students locate these features on their own specimens. The guides may also be used as a review tool for lab practicals or other assessments. A package of 10 Crayfish Dissection Guides, FB1919, and a package of 5 Crayfish Dissection Photo Guides, FB1920, are sold separately below.