Aluminum Grades Series 7xxx. Zinc, in amounts of 1 to 8% is the major alloying element in 7xxx series aluminum alloys (7075, 7050, 7049, 710.0; 711.0 etc.), and when coupled with a smaller percentage of magnesium results in heat-treatable alloys of moderate to very high strength.
We previously learned that arteries carry blood away from the heart and that veins carry blood toward the heart. This idea holds true here because we see that the pulmonary arteries are carrying blood away from the heart and the pulmonary veins are carrying blood to the heart. The interesting thing is that in most areas of the body, veins carry blood that is low in oxygen and arteries usually carry blood that's rich in oxygen.
from the heart, blood flows through the arteries to the different organs of the body and through every cell through the capillaries. blood in the arteries are high in pressure because they have just been pumped by the heart so the main driving force is the increased blood pressure brought about by cardiac contraction.rom the heart, blood flows through the arteries to the different organs of the body and through every cell through the capillaries. blood in the arteries are high in pressure because they have just been pumped by the heart so the main driving force is the increased blood pressure brought about by cardiac contraction.