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).
Blood flow to the tissues of the left atrium is provided by the left coronary artery, which branches from the aorta at the surface of the heart. Most of the posterior tissues of the left atrium receive blood from the left circumflex coronary artery, one of the major branches of the left coronary artery.