Answer:
That would Platelets.
Explanation:
Without giving too much detail, those are the specialized cell types that allow you to make scabs. Which is just blood clotting.
Cigarettes are items that you use for inhaling smoke produced by them. Smokeless tobacco serves other purposes than inhaling smoke, including chewing it, or sniffing it.
Blood! Cardiovascular system refers to the heart pumping blood around the body.