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Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?
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Blank is the growth of adnormal cells in the tissues of the body
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Describe how the immune system protects the body from the threat of disease. (minimum 5 sentences per paragraph)
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How the brain helps a person see is...
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