The cardiovascular system is closed system, writing homework help

The cardiovascular system is closed system that pumps blood all around your body. List and describe at least two diseases that affect the heart or blood vessels. Tell me two things that a person could do to help decrease to possibility of cardiovascular disease. 250 word minimum. Please have your initial post up by Wednesday and use the rest of the week to reply to two of your fellow students posts. Make sure to use proper APA if this information is not from your own head. It is okay to use outside information but it is not okay to not give credit to those whom you are using it from