Hope through depression

These 2 podcasts were excellent, so many good points were covered.  I have learned so much since my son's suicide that I wish I had known before. One thing I don't recall hearing anything about was the relationship between mental health and physical health. That is, can depression cause physical symptoms and or can physical symptoms cause depression?  I think I know the answer to that but would be interested in hearing a discussion on that sometime.  Thank you for a very informative discussion on depression.