Asked by Anonymous
                Which identifies strucrures of the human body in order from least complex to most complex levels of organization?
A. Human heart-circulatory system-artery- blood vessel
B. Nerve cell-brain tissue-brain-nervous system
C. Blood vessel-circulatory system-artery-human heart
D.brain tissue-cell-brain-nervous system
My answer is A. Please help! If I’m wrong please say why and what the answer is. Thanks
            
        A. Human heart-circulatory system-artery- blood vessel
B. Nerve cell-brain tissue-brain-nervous system
C. Blood vessel-circulatory system-artery-human heart
D.brain tissue-cell-brain-nervous system
My answer is A. Please help! If I’m wrong please say why and what the answer is. Thanks
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