What effect does smoking have on your cardiovascular system?

The chemicals in tobacco smoke harm your blood cells. They also can damage the function of your heart and the structure and function of your blood vessels. This damage increases your risk of atherosclerosis. Atherosclerosis is a disease in which a waxy substance called plaque builds up in the arteries.

i dont know it at allnow im just getting points at this pint

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?