Stomach: part of the digestive tract between the esophagus and the intestine. 0. Advertisement. Gonad: sex gland of a crayfish. Game Points. The gills are the segmented clumps of tissue on each side of the crayfish above the walking legs. Learn crayfish internal with free interactive flashcards. One of us! Powered by Create your own unique website with customizable templates. Today 's Points. PROCEDURE PART 2: Internal Anatomy of a Crayfish 1. Use the diagram of the internal anatomy of the crayfish to locate and identify the organs of the circulatory system. They look like clumps because they are dried out and stuck together. Online quiz to learn Male Crayfish Internal Anatomy; Your Skills & Rank. Get started! The head and thorax are fused, forming the cephalothorax. Encephalon: site of the mental functions of a crayfish. Heart: blood-pumping organ of the crayfish. Add to Playlist 1 … INTERNAL ANATOMY: The diagram below displays the crayfish with the carapace carefully removed exposing the underlying gills and other organs. Using gills, a crayfish breathes oxygen that is dissolved in water. You need to get 100% to score the 21 points available. 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). 21. Use the diagram of the internal anatomy of the crayfish to locate and identify the organs of the circulatory system. You may want to review or reference terms you don't ... diagrams to help you locate the organs. Choose from 107 different sets of crayfish internal flashcards on Quizlet. Add to favorites 11 favs. 2. Internal Anatomy of the Crayfish Directions: Follow the directions step-by-step, locating each of the structures in the order they appear in the directions. 1. The internal anatomy of a crayfish is very similar to that of a lobster. With a strong pair of scissors, cut the carapace away from the right side of the head and thorax. Place the specimen in the dissecting tray dorsal side up. You may use your book diagrams to help you locate the organs. It has 2 large pincers or claws called chelipeds. Crayfish External Diagram 2 Crayfish Internal Diagram Grasshopper Diagram External Grasshopper Diagram Internal Chapter 17 Vocab 17A (Madi) Chapter 18. The gills, which are feather-like structures found underneath the carapace and attached to the chelipeds and walking legs, are the organs of the respiratory system.. A constant flow of blood to the gills releases carbon dioxide and picks up oxygen. Some of the worksheets for this concept are Crayfish pre lab work, Crayfish dissection, Crayfish dissection, Fish id key, Lab 6 phylum arthropoda, Bony fish anatomy work, Earthworm anatomy answer key, Echinoderm dissection guide and lab answers. Today's Rank--0. In the crayfish anatomy video below, the gills are shown, although the narrator never refers to them. The crayfish has 8 jointed walking legs, a segmented body, 2 pairs of sensory antennae, and compound eyes. Actions. Crayfish Internal Anatomy Answers - Displaying top 8 worksheets found for this concept.. The crayfish has an open circulatory system in which the blood flows from arteries into sinuses, or spaces, in tissues. Internal anatomy of a crayfish: edible freshwater crustacean, with pincers on the two forelegs. Extensor muscles: muscle that extends the tail of the crayfish. 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