Cut along the indentations that separate the thoracic portion of the carapace into three regions. PROCEDURE PART 2: Internal Anatomy of a Crayfish. Anatomy of a Crayfish . Within this kingdom are subgroups, known as phyla. Dissection Procedure Carefully remove the carapace from the underlying organs. The crayfish has 8 jointed walking legs a segmented body 2 pairs of sensory antennae and compound eyes. Cephalic groove an indentation in the carapace between. The normal life span of a crayfish is about 2 - 3 years, and on average can get up to 6 inches in length though sometimes they are found to be larger. Phylum Arthropoda, Subphylum Crustacea. Internal anatomy of a crayfish 1. Anatomy: This crustacean has a hard exoskeleton that protects and supports the body. Put on safety goggles. Part 2—Internal Anatomy of a Crayfish 1. It has 2 large pincers or claws called chelipeds. 16. Using one hand to hold the crayfish dorsal side up in the dissecting tray, use scissors to carefully cut through the back of the carapace along dissection cut line 1, as shown in the diagram below. 15. Part 2—Internal Anatomy of a Crayfish. 1. Quizlet flashcards, activities and games help you improve your grades. Using one hand to hold the crayfish dorsal side up in the dissecting tray, use scissors to carefully cut through the back of the carapace along dissection cut line 1, as shown in the diagram below. INTERNAL ANATOMY: The diagram below displays the crayfish with the carapace carefully removed exposing the underlying gills and other organs. Put on a lab apron, gloves, and safety goggles. Crayfish Anatomy Phylum Arthropoda: In this lab, you will become familiar with the external and internal anatomy of a crustacean arthropod, the crayfish, Cambarus sp. Crayfish Internal Anatomy study guide by bennetta0078 includes 20 questions covering vocabulary, terms and more. Use a probe to disconnect any muscle stuck to the carapace as it is lifted away. Locate the dorsal tubular heart and several arteries. Using one hand to hold the crayfish dorsal side up in the dissecting tray, use the scissors to carefully cut through the back of the carapace along the dissection cut line #1 (as seen below on the diagram). If a crayfish loses a leg, the leg will regenerate (regrow). Internal anatomy of a crayfish: edible freshwater crustacean, with pincers on the two The body of a scorpion is divided into two parts: the cephalothorax (also.internal anatomy: The diagram below displays the crayfish with the carapace carefully removed exposing the underlying gills and other organs. The crayfish has 8 jointed walking legs, a segmented body, 2 pairs of sensory antennae, and compound eyes. Introduction: Crayfish belong to the Kingdom Animalia which includes all organisms that must consume their food (heterotrophs) and are multicellular. 2. 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