Instructor: Debbie Notari. Understanding a story's theme is critical to deciphering an author's message in a particular piece of writing. In this lesson, we will examine the idea of theme and look at some examples in actual literary works.
Location: The coronary system is comprised of arteries, arterioles, capillaries, venules and veins. The coronary arteries originate as the right and left main coronary arteries which exit the ascending aorta just above the aortic valve (coronary ostia).These two branches subdivide and course over the surface of the heart (epicardium) as they traverse away from the aorta.ocation: The coronary system is comprised of arteries, arterioles, capillaries, venules and veins. The coronary arteries originate as the right and left main coronary arteries which exit the ascending aorta just above the aortic valve (coronary ostia).
The left coronary artery (abbreviated LCA) is an artery that arises from the aorta above the left cusp of the aortic valve and feeds blood to the left side of the heart.t typically runs for 10 to 25 mm and then bifurcates into the anterior interventricular artery (also called the left anterior descending (LAD) and the Widow maker) and the left circumflex artery (LCx).