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The links between neighbouring arteries that provide an alternative route for blood if one vessel is blocked.
An anastomosis is a bypass link between arteries; a slow block lets collaterals grow (tissue survives); end-arteries (retina, brain) have none, so a sudden block causes an infarct; rich links lie around joints.
Coronary Arteries
The arteries that supply oxygenated blood to the heart muscle itself.
The Right Atrium
The heart chamber that receives deoxygenated blood from the body through the venae cavae and the coronary sinus and passes it to the right ventricle.
The Arch of the Aorta
The curved top of the aorta in the chest that gives off the great arteries to the head and arms and arches over the root of the left lung.
Venous Drainage of the Heart
How blood that has supplied the heart muscle is collected and returned, mostly through the coronary sinus into the right atrium.