The internal anatomy of a crayfish is very similar to that of a lobster. The crayfish has an open circulatory system in which the blood flows from arteries into sinuses, or spaces, in tissues. Locate the dorsal tubular heart and several arteries. Crayfish Internal Anatomy Answers - Displaying top 8 worksheets found for this concept.. Extensor muscles: muscle that extends the tail of the crayfish. Internal Anatomy of the Crayfish Directions: Follow the directions step-by-step, locating each of the ... you start this dissection). With a strong pair of scissors, cut the carapace away from the right side of the head and thorax. Use the diagram of the internal anatomy of the crayfish to locate and identify the organs of the circulatory system. The gills are the segmented clumps of tissue on each side of the crayfish above the walking legs. The crayfish has an open circulatory system in which the blood flows from arteries into sinuses, or spaces, in tissues. You need to get 100% to score the 21 points available. 0. Heart: blood-pumping organ of the crayfish. You may use your book diagrams to help you locate the organs. Choose from 107 different sets of crayfish internal flashcards on Quizlet. Internal anatomy of a crayfish: edible freshwater crustacean, with pincers on the two forelegs. *Check the box next to the number when you have completed that step. Add to Playlist 1 … Place the specimen in the dissecting tray dorsal side up. They look like clumps because they are dried out and stuck together. 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. The head and thorax are fused, forming the cephalothorax. Online quiz to learn Male Crayfish Internal Anatomy; Your Skills & Rank. Actions. Add to favorites 11 favs. If a crayfish loses a leg, the leg will regenerate (regrow). Encephalon: site of the mental functions of a crayfish. Using gills, a crayfish breathes oxygen that is dissolved in water. You may want to review or reference terms you don't ... diagrams to help you locate the organs. 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. Today 's Points. The crayfish has 8 jointed walking legs, a segmented body, 2 pairs of sensory antennae, and compound eyes. Gonad: sex gland of a crayfish. 21. One of us! Use the diagram of the internal anatomy of the crayfish to locate and identify the organs of the circulatory system. INTERNAL ANATOMY: The diagram below displays the crayfish with the carapace carefully removed exposing the underlying gills and other organs. 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). Game Points. Locate the dorsal tubular heart and several arteries. It has 2 large pincers or claws called chelipeds. Crayfish Internal Anatomy In addition to the diagram on the next page, there are labeled photographs of the internal anatomy of a preserved crayfish on page 186 of the Photographic Atlas. Advertisement. Powered by Create your own unique website with customizable templates. PROCEDURE PART 2: Internal Anatomy of a Crayfish 1. Today's Rank--0. In the crayfish anatomy video below, the gills are shown, although the narrator never refers to them. Stomach: part of the digestive tract between the esophagus and the intestine. Learn crayfish internal with free interactive flashcards. 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