Why do you think the development of cancer can be seen as a failure of the immune system?

-Why do you think the development of cancer can be seen as a failure of the immune system?
-What is the relationship between stress and disease? What are the differences and similarities between psychological and physiological stress? What is the relationship between the two? half page with reference

In an earlier chapter of your text, the characteristic of water called polarity was described as the attraction of water molecules have for each other. Why is this a problem for the respiratory system, and how is it solved?
-Identify which single cartilage is associated with a life threatening condition in children. What are the symptoms of this condition?
Another Half page with reference

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