Health has many definitions, but in my definition health is anything that makes a person lives in a good condition without any diseases or illnesses and can be mental health or physical health
If someone else falls in love with me in front of my eyes I will feel bad for him/her, but I will ask myself did I also love that person? If yes then I will be so sorry for myself and will do everything in my hands to win him/her back, If i didn't love, then I will let them go and live their lives peaceful.
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.