what fraction of the original area is the area of the reduced blood vessel? how might a calculation like thus help a biomechanical engineer working in the field? include your understanding of the cardiovascular system in your answer.

Okay, so i need some i just broke up with my boyfriend and i don't know what to do. i am crying everyday, i have nightmares, and i even wake up with the fear of talking to anyone else. it's not even making my addiction any better, it's making it worse.