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Dog Fish Shark Case Study

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1. Adult humans lack the post anal tail and notochord, during embryonic stage humans do contain this two hallmark characteristic but loses it. The notochord is replaced by the spine. Humans are classified chordates because during embryonic stage they contain all four hallmark characteristics.
2. Going with the assumption that the organ volume is an indication of an organs functional importance the liver will be considered of the greatest importance due to its large size. The dogfish shark’s liver functional importance are storing energy, creating bile and cleansing toxins. Even though the liver is an essential organ for the dogfish shark, it’s not as important as the heart. Therefore, the organ volume as an indication of functional importance

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