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.
Function of the Aorta
The aorta carries and distributes oxygen rich blood to all arteries
........as I said - down to the stomach and then off round the body, carrying oxygen as it goes.
Point being, it points down, not up. Blood collected downwards, not shot upwards. Think of the aorta as a hosepipe hanging out of the kitchen window and the water tap as the heart - puncture it and the pressure reduces and diverts from the main outlet. No forceful pressure pushing clots upwards.