Why are there so many capillaries in your bodies?

There are so many capillaries in our bodies so the blood can circulate fully around the body. The blood carries oxygen to our cells, and the capillaries carry around the blood to the hard to reach places, such as the tips of our fingers and the tips of our toes. When you cut of the circulation, or the blood flow, in your finger, and you get a bruise, this is because the capillaries have broken open. Without the capillaries, our cells would die from no circulation. Capillaries are very important for the Healthiness of our bodies.