Think about the last purchase you made at the store. did you know that when you made that purchase, you actually the economy grow? how did your purchase do that?

The store owner used the money earned from the purchase to pay wages to the store’s employees. Those employees then bought other goods and services. When they paid for those items, that store in turn paid its employees, and so the cycle continues.

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.