Lab report 4 2003 - Crayfish Anatomy Lab Lab 4 Christopher...

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Crayfish Anatomy Lab Lab 4 Christopher Chu Wednesday 6:00pm – 10:00 pm Objectives A) To observe external and internal structural characteristics of the crayfish and to relate  their function to their structural characteristics B) To relate understand the general anatomy of crayfish C) To observe the beating heart and record the rate of circulation of the ghost shrimp. D) To observe the movement of food and the internal respiration structures of the shrimp E) To observe the beating heart of an amphipod and observe the morphology of a different  crustacean.  F) Observe the digestion in a unicellular organism.  Materials Dissection Kit, Crayfish, fish net catcher, ghost shrimp, amphipods, methyl cellulose, congo red,  scalpel, cover slip, microscope slide, and paramecium. Procedure First, dissect a crayfish and locate the different organs. Locate different parts of the nervous  system, the circulatory system, the reproductive system, and the digestive system. Observe  under a dissection microscope the different external patterns and textures. Next, observe a  ghost shrimp and measure its heart rate. Compare with the crayfish and then inject dye near its  gills to see the flow of the water current produced by the shrimp. Then, observe an amphipod  and measure its heart rate as well. Compare the amphipod’s behaviors, characteristics, and  structure to the other two organisms previously observed. Finally, analyze t he digestion  process of a paramecium by staining it with methyl cellulose and congo red.
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Results and Analysis Anatomy of the Crayfish: The Dissection of an Arthropod Invertebrate 1) The first external structure of the crayfish we observed was the carapace, which is used 
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This note was uploaded on 04/07/2009 for the course BIO 206L 49125 taught by Professor Dr.allenlloyd during the Spring '09 term at UT Arlington.

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Lab report 4 2003 - Crayfish Anatomy Lab Lab 4 Christopher...

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