atrioventricular valves? pick three answers: attached to chordae tendinae, produce the first heart sound, prevent the backflow of blood into the atria, produce the second

All of the following are true of the anatomy of the heart except A. The epicardium has a serous membrane with a thin layer of fluid B. The myocardium is also known as the cardiac muscle C. The pericardium is primitive and will degenerate D. The endocardium also forms the heart valves Choose the correct answer

The first sound of a cardiac cycle occurs when the _____ and ______   (select them in alphabetical order) are closing.   The second sound of a cardicac cycle occurs when the  _______ and ________  (select them in alphabetical order)  are closing.   Word Options for Blanks: (some may not be used, some may be used more than once) aorta aortic valve bicuspid valve coronary sinus inferior vena cava left atrium left ventricle pulmonary arteries pulmonary trunk pulmonary valve pulmonary veins right atrium right ventricle superior vena cava tricuspid valve

The aorta of a cat branches off into the the and arteries before is descends downward as the descending thoracic aorta. Choose 2 options: O left common carotid artery O left subclavian artery O right common carotid artery O brachiocephalic artery O right subclavian artery