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Tales of its heart being as big as a car, with the aorta (its main artery) large enough for a human to swim through abound, but as finding intact specimens to research is rare, the truth has been difficult to find out. So when a dead blue whale washed ashore in Newfoundland, Canada, experts saw a valuable opportunity.
The largest artery from the heart is called the aorta. This artery branches into smaller and smaller vessels before finally reaching the tiny capillaries where oxygen and nutrients are delivered to organs and tissues. The other main artery from the heart goes to the lungs where its blood picks up oxygen.Veins are the blood vessels that carry blood back to the heart. They have much thinner walls than arteries and are under less pressure.he other main artery from the heart goes to the lungs where its blood picks up oxygen. Veins are the blood vessels that carry blood back to the heart. They have much thinner walls than arteries and are under less pressure.