Genetics or lifestyle. Meaning tobacco use, etc.
Answer:
Failure of the respiratory system would cause failure of the circulatory system because the respiratory system helps you breath and with you not breathing it would cause the circulatory system to fail because breathing makes the blood flow through the circulatory system.
Explanation:
I am diabetic and the only one that i know of that does not happen is recurring infections unless you have very easily bruised skin and then maybe it can happen if you get sick or something
