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Crayfish Nervous System Lab Report

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The nervous system of a crayfish contains a ventral nerve cord. This nerve cord transmits signals to the ganglion cells. The ganglion cells are in the tail of the crayfish in which it controls the muscles of the tail as well. The anatomy of the crayfish is simple yet all of its functions are important to their day-to-day lives. They are mainly composed of extensor muscles, gonads, hearts, encephalon, stomach, eyes, green gland, mouth, mandible, esophagus, maxilliped, ventral nerve cord, and ganglion of the ventral nerve cord, a digestive gland, flexor muscles and an anus. One can determine the sex based on their pleopod or gonopod. The crayfish ventral nerve cord is said to be similar to our spinal cord. Their VNC (ventral nerve cord) are linked to …show more content…
We cautiously removed the exposed muscles to get to the ventral nerve cord. To describe what we saw, we noticed that the ventral nerve cord was hard to observe so we placed it under the microscope again. Prior to measuring action potentials, we set up the LabTutor Application according to the lab manual. Once the application was setup we conducted our experiment. The chlorided silver wire we obtained earlier was used to place under the nerve cord near the telson and attached the white lead to the negative input (Ch 1). To make sure our program was running correctly, we clicked on the Compression button and watched what the graph did. Placing another wire above the first wire on the opposite side, we attached the other end to the positive input (Ch 1). There was a green wire that we clipped to the pin that was pinned into the body of the crayfish. We also had to make sure that the wires did not touch each other. There was a 5-10 millimeter distance in between our electrodes. We also put more freshwater on the crayfish so it would not dry out. According to the lab manual, the hairs on

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