This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
In circulatory system,example heart attack.It begins when you ate too much fats.It blocking the path of the blood *blood vessel* so the heart reacts because there not enough blood inside it.The respiratory system if you smoking too much or your a chain smoker that will cause you a lung cancer.
6 4 6
They Begin To develop when they keeping their circulatory and respiratory not healty example drinking beer etc. 
2 3 2