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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.
1 The aorta is the main artery that carries oxygen-rich blood pumped from the left side of the heart out to the body. 2  The coronary arteries are the other important arteries attached to the heart. 3  They carry oxygen-rich blood from the aorta to the heart muscle, which must have its own blood supply to function. The pulmonary valve is in the right side of the heart, between the right ventricle and the entrance to the pulmonary artery, which carries blood to the lungs. 2  The mitral (MI-trul) valve is in the left side of the heart, between the left atrium and the left ventricle.