Answer: Those parts is were all the oxygen is distributed through the human body, and so technically it can be considered the respiratory system.
That would be natural cures
Answer:
Cancer typically develops gradually, and the signs and symptoms aren't initially
Explanation:
Hope this helps :)
Gonorrhea is treatable, but that doesn't mean it treats itself. Just like cancer, pneumonia, etc., gonorrhea needs medicinal treatment and if that treatment never occurs the consequences can be devastating.
Development of modern surgery,first vaccination,and stethoscopes.