If Sheffield was the beating heart of the region, then the Lower Don Valley – through which the canal runs – was its aorta; an urban area dominated by steel production and associated manufacturing industries that were key to the city's identity for so many years.
The first is that the organ's left ventricle the chamber that pumps aerated blood out of the heart and through an artery known as the aorta to the rest of the body becomes both too big and too flabby to do its job.
From the inferior vena cava, the blood enters the right atrium, then passes through the foramen ovale into the left atrium; from there it moves into the left ventricle and out through the aorta, which pumps the oxygenated blood to the head and upper extremities.
Left-heart catheterization is accomplished by introducing a catheter into the brachial or femoral artery (in the upper arm and thigh, respectively) and advancing it through the aorta across the aortic valve and into the left ventricle.
Unoxygenated blood is driven forward via a vessel called the ventral aorta.
Resistance began to crumble in 1938, when Robert Gross successfully tied off a persistent ductus arteriosus (a fetal blood vessel between the pulmonary artery and the aorta).
One of the most common congenital cardiovascular abnormalities involves the aorta.
Blood ejected into a rigid aorta encounters increased flow resistance that is manifested by increased cardiac work and elevated systolic blood pressure.
While this does not often occur in the aorta, chronic occlusive disease can significantly alter flow in very large aortic branches, such as the carotid and iliac arteries.
It is located in the chest (thoracic) cavity behind the breastbone (sternum), in front of the windpipe (trachea), the esophagus, and the descending aorta, between the lungs, and above the diaphragm (the muscular partition between the chest and abdominal cavities).
Blood is forced from this chamber through the aorta to all parts of the body except the lungs.
