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6. Where do the superior and inferior caval veins open? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle E) Left auricle 7. Where is the heart placed in the thoracic cavity? A) Superior mediastinum B) Inferior mediastinum C) Middle mediastinum D) Anterior mediastinum E) Posterior mediastinum 8. What is the name of the inner layer of the heart? A) Epicardium B) Myocardium C) Subcardium D) Endocardium E) Postcardium 9. Where is the coroner arteries arise? A) Ascending aorta B) Descending aorta C) Aortic arch D) Thoracic aorta E) Abdominal aorta

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6. Where do the superior and inferior caval veins open? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle E) Left auricle 7. Where is the heart placed in the thoracic cavity? A) Superior mediastinum B) Inferior mediastinum C) Middle mediastinum D) Anterior mediastinum E) Posterior mediastinum 8. What is the name of the inner layer of the heart? A) Epicardium B) Myocardium C) Subcardium D) Endocardium E) Postcardium 9. Where is the coroner arteries arise? A) Ascending aorta B) Descending aorta C) Aortic arch D) Thoracic aorta E) Abdominal aorta

6. Where do the superior and inferior caval veins open? A) Right atrium B) Left atrium C) Right ventricle D) Left ventricle E) Left auricle 7. Where is the heart placed in the thoracic cavity? A) Superior mediastinum B) Inferior mediastinum C) Middle mediastinum D) Anterior mediastinum E) Posterior mediastinum 8. What is the name of the inner layer of the heart? A) Epicardium B) Myocardium C) Subcardium D) Endocardium E) Postcardium 9. Where is the coroner arteries arise? A) Ascending aorta B) Descending aorta C) Aortic arch D) Thoracic aorta E) Abdominal aorta

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superior and inferior caval veins open into the right atrium of the heart. Therefore, the correct answer is A) Right atrium.<br /><br />7. The heart is located in the middle mediastinum of the thoracic cavity. Therefore, the correct answer is C) Middle mediastinum.<br /><br />8. The inner layer of the heart is called the endocardium. Therefore, the correct answer is D) Endocardium.<br /><br />9. The coronary arteries arise from the aortic arch. Therefore, the correct answer is C) Aortic arch.
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