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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 aorta is the largest artery in the body. Arteries are vessels that carry blood away from the heart. The aorta arises from the left ventricle of the heart, forms an arch, then extends down to the abdomen, where it branches off into two smaller arteries. The aorta carries and distributes oxygen rich blood to all arteries. Most major arteries branch off from the aorta, with the exception of the main pulmonary artery. The walls of the aorta consist of three layers. They are the tunica adventitia, the tunica media, and the tunica intima. These layers are composed of connective tissue, as well as elastic fibers.