Friday, February 3, 2012

This week in science #8




       Me and my partner dissected a craw fish. The craw fish has many different sections. It has many legs and a mouth with many different looking antennas. It has claws and many different looking parts. it must have these features because it needs to adapt to its environment in the ocean.We cut the craw fish from posterior to anterior, which is head to tail. The lungs of the craw fish was proximately in the same place where the heart should be but on the right side. 
       I learned many things from this dissection. I learned that the liver of a craw fish is yellow which I didn't know before because I thought that it was the same color as a human beings. I also learned that in the tail of a craw fish there is meat. I thought that there was just empty shell but I was wrong. Some questions I have are why is the liver yellow? Also where is the heart ? I didn't see one when me and my partner Andy dissected it . There was more legs that I expected the craw fish to have which was weird becuase I thought it couldnt have more than 4 or 6 legs but it had about 10 or 12 legs all together. The claws were almost different sizes and I didn't know that. I thought that the claws were all one side. I think that this lesson about the dissection is similar to the lesson about the rockets because we had to take apart a certain thing and label parts.

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