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This Concept Map, created with IHMC CmapTools, has information related to: Boron Chapter 24 - Special Circulations, Thebesian veins drain directly into Left ventricle, β1 adrenoreceptors bind norepinephrine released from sympathetic neurons that innervate the SA & AV nodes + the myocardium Increase heart rate (positive chronotropic effect) and contractility (positive ionotropic effect), Sympathetic β1 adrenoreceptors bind norepinephrine released from sympathetic neurons that innervate the SA & AV nodes + the myocardium, Coronary Circulation begins at the aorta Right coronary artery, Right atrium Eventually ends up Coronary Circulation begins at the aorta, Left anterior interventricular artery (aka left anterior descending artery) Supplies Interventricular septum*, Great cardiac vein (left anterior interventricular vein) Empties into Coronary sinus, α adrenoreceptors of vascular smooth muscle cells bind norepinephrine released from sympathetic neurons that innervate the SA & AV nodes + the myocardium Vasoconstriction, Generally, the release of local metabolites - particularly adenosine - causes vasodilation that overrides sympathetic vasoconstriction* Vasoconstriction, Coronary sinus Empties into Right atrium, Sympathetic α adrenoreceptors of vascular smooth muscle cells bind norepinephrine released from sympathetic neurons that innervate the SA & AV nodes + the myocardium, Parasympathetic (vagus nerve) Only has a major effect on heart rate because parasympathetic nerve fibers are mostly found surrounding the SA & AV nodes, Coronary Circulation begins at the aorta Left coronary artery*, Left coronary artery* Splits into Left anterior interventricular artery (aka left anterior descending artery), Right coronary artery Supplies Right atrium, Left anterior interventricular artery (aka left anterior descending artery) drained by Great cardiac vein (left anterior interventricular vein), Right coronary artery Supplies Posterior interventricular artery, Left anterior interventricular artery (aka left anterior descending artery) Supplies Left ventricle, Right coronary artery Supplies Individual branch to the sinuatrial node, Innervation of the Heart Parasympathetic (vagus nerve)