XYZ

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transporting oxygen, nutrients, and hormones while removing waste like carbon dioxide, protecting the body from pathogens through white blood cells and by sealing wounds with platelets, and regulating body temperature and maintaining homeostasis.
开始学习 		transporting oxygen, nutrients, and horm 用英语
transporting oxygen, nutrients, and hormones while removing waste like carbon dioxide, protecting the body from pathogens through white blood cells and by sealing wounds with platelets, and regulating body temperature and maintaining homeostasis.
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