<span>A panic attack. I've experienced them and they are not fun at all. They can either be triggered by something seemingly small or even nothing at all. If you are having a panic attack, while it's preferable not to have to go to the hospital, it's better to get checked out and find out that it's a panic attack than to not go and find out it's a heart attack. While it may not be what you think it is, the symptoms are real, and should be treated as such. There is no reason to feel guilty for being concerned with your health.</span>
Answer:
Development of the human heart during the first eight weeks (top) and the formation of the heart chambers (bottom). In this figure, the blue and red colors represent blood inflow and outflow (not venous and arterial blood).
I Hope This Helped You :D
From what i heard, when carbon monoxide is in a person's blood (smoker or non smoker) it can kill you, it is a sign of poison in your blood. With smokers it is worse because they are smoking something that has a high content of carbon monoxide which can cause heart problems, lung cancer, birth defects, etc. So thats what i think
