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Why are the left and right coronary vessels considered the major coronary vessels?
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- What is the function of the coronary sinus?What pressure difference between the ventricle and the atrium causes theatrioventricular valve to close?What are the three principal branches of the left coronary artery? Where are they located on the heart surface? What are the branches of the right coronary artery, and where are they located?
- Why is the Sino-atrial node called the pacemaker of the heart?(a) Describe how heart contraction and relaxation influence coronary blood flow. (b) Name the major branches of the coronary arteries, and note the heart regions served by each.What are the three major veins that empty into the coronary sinus?
- Which component of the conducting system is located in thefloor of the right atrium, between the right AV valve and thecoronary sinus opening?(i)List the major blood vessels and their origins involved in coronary circulation.(ii) At what stage or phase of the heart’s activities does the heart tissues becomes perfused with oxygenated blood? (iii) Define myocardial infarction.(iv) Explain the typical signs associated with acute myocardial infarction. (v) Outline/State which arteries of the heart are most commonly affected/occluded.(vi) Explain why occlusions lead to infarct in the heart.How does blood composition differ in the right and left ventricle?