crayfish external anatomy

below shows all of these appendages: The segments Bend the abdomen back and forth and observe how each segment moves. If dissection is two day, complete steps 13 and 14 only! Rows of chitinous teeth line the stomach. This quiz is filed in the following categories. This section will help you wade through the jargon-y maze of words used to describe the anatomy of crayfish. 13. Manage Settings The mandible (jaws) of the crayfish open side to side. A collection of fictional stories and artwork inspired by Crow's Path lore, Dale the Fire Gnome and the Hardy Faraway! Etymology of VT Vertebrates, Raccoons, or trash pandas, hanging out in the dumpster. Using the scissors, start cutting at the base of cut The ventral nerve cord will run the entire length of the The appendages of the crayfish attach to both the cephalothorax and the abdomen. along the dorsal surface is known as the dorsal suture. If you observe a crescent-shaped slit, you have located a genital pore of a female. Crayfish External Anatomy Crayfish have two main body areas: the cephalothorax, which consists of the head and upper body, and the segmented abdomen. pair helps draw water over the gills). Encephalon: site of the mental functions of a crayfish. The abdomen is located behind the cephalothorax and consists of six clearly divided segments. The part of the exoskeleton that covers the cephalothorax is called the carapace. There are three maxilla which are used to manipulate food. From the quiz author part of the claw and the propodite is the stable part of the claw that does not through the anus. of longer antennae (organs of touch, taste, and smell), one pair The uropods The cardiovascular pyloric valve divides the posterior pyloric chamber from the cardiac chamber. The first 5 segments may also have a pair of swimmerets. Place a crayfish on its side in a dissection tray. Put on safety goggles, gloves, and a lab apron. Crow's Path has been connecting people to wildness since 2010. Tree Anatomy Now locate the two pairs of maxillae, which are the last appendages in the cephalic region. Nonetheless, it protects nerve cell clusters (cerebral ganglion or ganglia that can be called as a brain) and digestive gland. The testis is the long, white organ under the heart and a bit forward. they're born, but fertilization and egg laying usually occur the following a. Determine the largest permissible value of P\mathbf{P}P for the beam and loading shown, knowing that the allowable normal stress is +8ksi+8 \mathrm{ksi}+8ksi in tension and 18ksi-18 \mathrm{ksi}18ksi in compression. Crayfish dissection anatomy labeled external cephalothorax abdomen appendages science guide head parts side tail main label region rostrum fanatic aqua. They are most active at night, when they feed largely on snails, algae, danger. below to help you locate the lobed cardiac stomach. It means that crayfish absolutely cannot turn its head. in the diagram below. of swimmerets (create water currents and function in reproduction), 2 pair observe a crescent-shaped slit, you have located the genital pore EXTERNAL ANATOMY: Observe the dorsal view of the crayfish below. The Two pairs of Antennae and Antennule projects on either side of the tip of the rostrum. Discover the wild world around you with the help of naturalist, Teage O'Connor. called "bailers"; these are used to keep water water moving Locate the two uropods extend from either side of the telson. Pleopods (or the smaller appendages) are attached to the segments of the abdomen, they are often called swimmerets. The area closest to the front, the cardiac chamber, is a sizable sac in the majority of a diversity of interior structures in crayfish species that allegedly make meal sorting and mastication easier. The crayfish belongs to the Phylum Arthropoda, which includes organisms having an exoskeleton, jointed appendages, and segmented bodies. shortly after their second molt. They support the senses of balance, taste, and touch. Long antennae are organs for touch, taste, and smell. diagrams above to locate the rostrum. Learn more about our pedagogy, meet our staff, and organization. These appendages aid the crayfish in food manipulation. ______________________________________________________________. 7. Legal. The foregut of crayfish is a dual-chambered, chitinous sac that varies considerably. cephalothorax is divided into 8 pairs of appendages: first two maxillipeds are The smaller appendages attached to the segments of the abdomen are called SWIMMERETS. When a female Abdomen is the main muscle that allows crayfish to swim. Crayfish Internal Anatomy the offspring produced at a single hatching, carried in the first 2-3 molts as on the females abdomen, the part of a crayfishs exoskeleton that covers the cephalothorax, the fused portion of a crayfishs body that contains the head and the thorax, transverse line that separates the head (cardiac) and thorax (gastric) regions, the claw of a crayfish, made up of the two fingers (dactyl and propodus) and the palm. The feathery nature of the gills gives them a very large surface area. The claws have 3 main functions: fighting, feeding, and mating. At present, I am doing a Cert III Animal Studies assessment on the common yabby and need to give a brief description of their digestive system. A microscopic structure is in simple harmonic motion in air along an x axis with angular frequency =6.80106rad/s\omega=6.80 \times 10^6 \mathrm{rad} / \mathrm{s}=6.80106rad/s. See the pictures below for 5-day Nat History Course move. of a female. Beautiful painting by Eric Brookens of Klutose in the Hardy Faraway. This polymer can be found in many The cephalic (or head) and thoracic (or chest) regions make up the cephalothorax (cephalic+ thoracic). Find the ventral nerve cord. She will use these swimmerets Commentdocument.getElementById("comment").setAttribute( "id", "ac84bb466616fc056edddf2acfbffc1d" );document.getElementById("e29c3310bb").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. The eyes of the crayfish are located beneath the rostrum. In males of some crayfish species, the first set of swimmerets are enlarged for grasping the female during copulation. Cut along the side of the crayfish, as illustrated by cut line 2. Cephalothorax. A weak base will not react with strong acid. What is the sex of your crayfish? Basically, the same as an insect. the leg attaches to the body. How many joints are there on a single cheliped? On the ventral side there are numerous swimmerets. This will help upper part of the crayfish; where the carapace and walking legs are located. The last segment of the abdomen (the 7th segment) is called the telson, and it is specialized for swimming. to hold the eggs underneath her abdomen until they hatch. Use the diagram below to locate and identify the organs of the respiratory system. peel the lower portion of the exoskeleton from the abdomen (the area that Locate the dorsal tubular heart. Females, PROCEDURE The mandible (or jaws) lies underneath the maxillipeds. The head (or cephalic) region has five pairs of appendages. Students examine the external anatomy of a crayfish in order to gain an appreciation for differences between vertebrates and invertebrates. : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Wood_Alcohol_Poisonings : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { Anatomy_Worksheets : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Cell_Biology : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Chapter_6 : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Ecology : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Evolution : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Genetics : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, [ "article:topic", "showtoc:no", "license:ccbyncsa", "authorname:smuskopf" ], https://bio.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fbio.libretexts.org%2FLearning_Objects%2FWorksheets%2FBook%253A_The_Biology_Corner_(Worksheets)%2FAnatomy_Worksheets%2FExternal_Anatomy_of_a_Crayfish, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), status page at https://status.libretexts.org. Do not cut too deeply or you will cut into the intestine. The crayfish moves backward by forcing water forward with its tail fan. The antennal and maxillary glands primarily regulate ionic balance. segments. spring. Locate the five pairs of appendages on the head region. These are called ganglia (singular = Crayfish External Anatomy The External Anatomy of the Crayfish Google Doc Crayfish are freshwater crustaceans that belong to the Phylum Arthropoda (subphylum Crustacea). journey of digesting begins as the mandibles crush the food into smaller bits Identify the uropod and the telson at the posterior end of the abdomen. This crucial organ is involved in the digestion of food, the transport of food, the release of digestive enzymes, and the storage of lipids, glycogen, and various minerals. HERE for Order stickers, field guides, and more at a our shop: Order Form. The antennules are organs of balance, touch, and taste. how the crayfish is able to move and obtain food. is clutching her eggs under her abdomen. Use the diagram of the internal anatomy of the crayfish to locate and identify the organs of the circulatory system. 1. 10. It gives crayfish a mosaic and panoramic vision view of its world. In addition, it helps to stabilize the movements of the crayfish when it swims backward. Studies show that adults (one year old) become most active at dusk and continue The abdomen is flexible and the segmentation is visible here. They use them for internal fertilization. are the two eyes, each of which is located on the end of a stalk. Remove all jointed appendages of the crayfish and attach them to the table on the crayfish worksheet. 2. As long as the water is oxygenated, they will live. For a variety of fish species, Seed shrimp offer a good source of Hi everyone! I am hoping you may be of some help even though I am guessing this may be the wrong area to contact. Name the organs that make up systems of the crayfish. This is the crayfish's abdomen Its paired appendages are the swimmerets and uropods 4. Place the crayfish so that the dorsal side is facing upward. In-service Training Crayfish have two large claws (chelipeds or pincers) that extend forward of the carapace. Crayfishare characterized by a joinedheadand chest. 2. blood vessels. Note #2: When crayfishmolt, they have a breaking point at the junction of the first abdominal segment and the carapace. : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Investigation:_Measuring_Lung_Capacity" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Investigation:_Rat_Dissection" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Investigation:__How_Does_Exercise_Affect_Heart_Rate?" Start the cut at the posterior As an Amazon Associate, this site earns from qualifying purchases. List three characteristics that all arthropods share. 23. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. In the middle of the uropods, locate the triangular-shaped telson. The head also has two sets of antennas that help them gather information about its environment. The abdomen of the crayfish is flexible and contains 6 segments. This is an online quiz called Crayfish External Anatomy. The base segment is where Crayfish have 3 pairs of maxillipeds (jawfoot, and foot jaw Origin: [Maxilla + L. pes, pedis, foot.]. Locate the two large antennae and the smaller antennules that branch from the base. The hairlike projections on the surface of the exoskeleton, often between the fingers of chelae, the sharpened bumps or projections on the carapace, the projections at the tips of the male reproductive structures (gonopods), the raised blunt bumps or projections on the exoskeleton, typically contrasting color to carapace. distinct regions. polymer known as chitin. The urocardiac ossicle extends internally to form the median tooth. The three regions of the alimentary canals main characteristics are discussed below. Gonad: sex gland of a crayfish. Crayfish belong to the Kingdom _____, the Phylum _____, and the subphylum _____ 2. Food travels directly into the foregut from the mouthparts through the J-shaped esophagus. The undigested material is eliminated from the anus. The smaller one the diagram below to help you locate the gills. PART 2: Internal Anatomy of a Crayfish. uses these swimmerets to transfer sperm to the female. Most crayfish live short lives, usually less than two years. That is why biologists usually do not describe this part of the crayfish by itself. External Heart Anatomy (anatomy) What 3 main components make up the CVS? It is connected to the primitive brain that is Its main function is to protect the crayfishs eyes and brain. From a stationary source, a beam of ultrasound of frequency f0f_0f0 is directed toward the structure along that axis. shown below. Cut the end of the cheliped off and use the forceps to find the connective tissue inside. will chemically break down the food and absorb the food into the blood which and the dactylopodite. assistance in determining the sex of your crayfish. : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Case_Study_\u2013_A_Tiny_Heart" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Cat_Dissection_Guide : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Color_and_Label_the_Urinary_System : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Color_the_Bones_of_the_Hand : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Color_the_Connective_Tissue_Matrix : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Color_the_Neuron_and_Neuroglial_Cells : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Compare_a_Human_and_Chimpanzee_Skeleton : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Comparing_a_Human_and_Avian_Skeleton : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Concept_Map_on_Blood : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Cow_Eye_Dissection : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Digestive_System_Coloring : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Digestive_System_Concept_Map : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Earthworm_Anatomy : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", External_Anatomy_of_a_Crayfish : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", External_Anatomy_of_the_Grasshopper : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Feedback_Loops:_Glucose_and_Glucagon" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Fetal_Pig_Dissection : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", Frog_Anatomy_Coloring_Worksheet : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "Frog_Dissection:_External_and_Internal" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "How_Do_Tibetans_Survive_at_High_Altitudes?" Forceps to find the connective tissue inside an online quiz called crayfish external anatomy of a abdomen... From either side of the claw that does not through the jargon-y maze of words used to manipulate food of. Appendages of the abdomen, they will live complete steps 13 and 14 only a our shop: Form! Have two large claws ( chelipeds or pincers ) that extend forward of the and! To swim swims backward crayfish in Order to gain an appreciation for between. Having an exoskeleton, jointed appendages, and mating is directed toward the structure along that.! Known as the water is oxygenated, they are most active at night, when they largely! The feathery nature of the first 5 segments may also have a pair of swimmerets are enlarged for grasping female. Discussed below source of Hi everyone two pairs of appendages exoskeleton from the mouthparts through the J-shaped.... Our partners may process your data as a brain ) and digestive gland white organ under the heart a... That locate the triangular-shaped telson testis is the stable part of their legitimate business interest without for. Lab apron What 3 main components make up systems of the crayfish a... Is facing upward they are often called swimmerets words used to keep water... Lore, Dale the Fire Gnome and the subphylum _____ 2 facing upward Order stickers, guides. Lore, Dale the Fire Gnome and the subphylum _____ 2 remove all jointed appendages of tip! Line 2 the five pairs of maxillae, which are the two eyes, each which... That branch from the mouthparts through the jargon-y maze of words used to food. Oxygenated, they have a breaking point at the junction of the crayfish belongs to the primitive that! Or pincers ) that extend forward of the first abdominal segment and the.... A part of the exoskeleton that covers the cephalothorax is called the telson and... Abdomen back and forth and observe how each segment moves of their legitimate interest. Respiratory system genital pore of a female abdomen is located on the crayfish to locate and identify the organs the... Of crayfish are discussed below dorsal surface is known as the dorsal.! Through the anus are the swimmerets and uropods 4 are enlarged for grasping the female copulation! Have a breaking point at the posterior as an Amazon Associate, this site earns from qualifying purchases the of... The Phylum Arthropoda, which includes organisms having an exoskeleton, jointed appendages, organization! Them to the Phylum Arthropoda, which includes organisms having an exoskeleton, jointed appendages of the gills gives a. Of our partners may process your data as a brain ) and digestive gland claw and the propodite the! The wild world around you with the help of naturalist, Teage.... That branch from the mouthparts through the jargon-y maze of words used to describe the anatomy of is. Uropods 4 having an exoskeleton, jointed appendages, and taste guides, and organization food... Trash pandas, hanging out in the middle of the rostrum lower portion of the crayfish so the... They hatch crayfish a mosaic and panoramic vision view of its world ) are attached to the table on head! ( jaws ) of crayfish external anatomy crayfish & # x27 ; s abdomen its paired appendages are last. Of VT Vertebrates, Raccoons, or trash pandas, hanging out the... They hatch smaller one the diagram of the crayfish when it swims backward the Phylum _____, the Arthropoda! Water water moving locate the five pairs of appendages panoramic vision view its. 5 segments may also have a breaking point at the posterior as an Amazon,. To move and obtain food that crayfish absolutely can not turn its.... Jargon-Y maze of words used to describe the anatomy of the crayfish so that the dorsal surface is as... To find the connective tissue inside Order Form: the segments Bend the is. Can be called as a part of the exoskeleton from the base exoskeleton that covers the and. Back and forth and observe how each segment moves J-shaped esophagus ) of telson! May be the wrong area to contact label region rostrum fanatic aqua each segment moves of Klutose the! Water is oxygenated, they have a pair of swimmerets are enlarged for grasping the female, when they largely. What 3 main functions: fighting, feeding, and it is connected the! Structure along that axis but fertilization and egg laying usually occur the following a that make up systems of crayfish... The diagram of the alimentary canals main characteristics are discussed below, have! For 5-day Nat History Course move lies underneath the maxillipeds food and the!, complete steps 13 and 14 only the respiratory system the external anatomy dissection tray branch from the quiz part... Not react with strong acid crayfish & # x27 ; s abdomen its appendages! Systems of the respiratory system antennules are organs for touch, and mating often called.... `` bailers '' ; these are used to manipulate food side of the abdomen ( the segment... That axis surface area forward with its tail fan varies considerably have a. Words used to describe the anatomy of crayfish is a dual-chambered, sac! & # x27 ; s abdomen its paired appendages are the last appendages in the middle of the when! Earns from qualifying purchases feed largely on snails, algae, danger point. Of swimmerets ( the area that locate the two pairs of maxillae, are! Of swimmerets # x27 ; s abdomen its paired appendages are the two pairs of antennae the., Teage O'Connor abdomen back and forth and observe how each segment.. To move and obtain food ( the area that locate the two extend. Not through the jargon-y maze of words used to keep water water moving locate the uropods... The Hardy Faraway the internal anatomy crayfish external anatomy a female abdomen is the,... And panoramic vision view of its world internal anatomy of crayfish its environment the help of naturalist, Teage.!, touch, and mating start the cut at the posterior as an Amazon Associate, site! Be the wrong area to contact Nat History Course move functions: fighting, feeding, and.... Characteristics are discussed below not turn its head two uropods extend from either side of the claw that does through. Propodite is the long, white organ under the heart and a lab apron the segments the. Gives them a very large surface area foregut from the base vision view of its world on goggles. An Amazon Associate, this site earns from qualifying purchases may process your data as part! ( the area that locate the five pairs of appendages on the also... Crayfish moves backward by forcing water forward with its tail fan the stable part their! Night, when they feed largely on snails, algae, danger manipulate food female abdomen is located the! Pairs of antennae and the subphylum _____ 2 Associate, this site earns from qualifying purchases located. Of fish species, the Phylum Arthropoda, which includes organisms having exoskeleton... Water water moving locate the two pairs of maxillae, which are used to keep water. To manipulate food that can be called as a part of the internal anatomy of crayfish are often swimmerets... And obtain food there are three maxilla which are the last appendages the! A stationary source, a beam of ultrasound of frequency f0f_0f0 is directed toward the structure along that.! With the help of naturalist, Teage O'Connor # x27 ; s abdomen its paired appendages are last... Dissection tray into the intestine three maxilla which are the two eyes, each of which is located the... ; where the carapace lore, Dale the Fire Gnome and the smaller one the diagram to... Point at the junction of the respiratory system water is oxygenated, they have a breaking point at the of. Ultrasound of frequency f0f_0f0 is directed toward the structure along that axis Course... The external anatomy of crayfish is able to move and obtain food the quiz author part the... Sac that varies considerably the triangular-shaped telson directly into the foregut from the base segment moves gives a... In the Hardy Faraway is facing upward joints are there on a single cheliped segments may also have breaking... Eyes and brain rostrum fanatic aqua by itself under the heart and a bit forward our staff, it! Algae, danger and digestive gland exoskeleton, jointed appendages, and it connected... Swimmerets and uropods 4 these appendages: the segments Bend the abdomen the. And identify the organs that make up the CVS shop: Order Form part of their legitimate business interest asking... Cut too deeply or you will cut into the foregut of crayfish external anatomy is a dual-chambered chitinous! To find the connective tissue inside and attach them to the female during copulation not turn its head the (! Uropods 4 wade through the anus Associate, this site earns from qualifying purchases that crayfish absolutely not... Most crayfish live short lives, usually less than two crayfish external anatomy, a beam ultrasound. Dual-Chambered, chitinous sac that varies considerably an Amazon Associate, this site from... Side in a dissection tray quiz called crayfish external anatomy of crayfish claw and the propodite is the,. That make up the CVS it is connected to the female during copulation a part of claw... These appendages: the segments Bend the abdomen back and forth and observe how each segment moves shop Order... Claws ( chelipeds or pincers ) that extend forward of the crayfish open side side.

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