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Q: Hemoglobin carries oxygen to the body's cells. Which system contains hemoglobin? A. nervous B. endocrine C. respiratory D. circulatory
A: D. circulatory
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User: Hemoglobin carries oxygen to the body's cells. Which system contains hemoglobin? A. nervous B. endocrine C. respiratory D. circulatory

Weegy: D. circulatory
batotoy|Points 1475|

User: Cells such as nerve and muscle cells contain more mitochondria than other cells. Why? A. Nerve and muscle cells use more energy. B. Nerve and muscle cells store more nutrients. C. Nerve and muscle cells degrade more proteins. D. Nerve and muscle cells divide more frequently.

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Asked 7/17/2012 12:58:30 PM
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