Anatomy MD3001 Questions and Correct Answers | Latest Update | A+

Contents of Coronary Sulcus Ans: Right Coronary Artery Left Circumflex Artery Coronary Sinus. Anterior interventricular sulcus Contents Ans: Anterior interventricular artery and vein. (aka Great cardiac vein.) Posterior interventricular Sinus Ans: Posterior interventricular artery and vein (aka middle cardiac vein). Crista terminalis of right atrium Ans: Smooth ridge at edge of pectinate muscle, separates right atrium from auricle. Called sulcus terminals externally. Fossa Ovalis Ans: remnant of foramen ovale during fetal development. Surrounded by margin called limbus fossae ovalis. Right ventricle Ans: 1, Trabecular carnea 2. Septomarginal trabecular (carries AV node right bundle branch) Central ridge between papillary muscle and IV septum. 3, Papillary Muscles: Keeps AV valves closed, attached to chord tontine, contracts during diastole. Has infundibulum, which is a smooth surface directly before pulmonary trunk, encourages laminar flow. Left Atrium Ans: HAs 4 valveless pulmonary veins entering. Falx Septi: Remnant of foramen Ovale, not at same level as fossa ovalis. Left Ventricle: Ans: Has trabecular carne and 2 papillary muscles that are attached to chord tendinae and annulus fibrosis of valve but does not have Sept-marginal trabecular. Has aortic vestibule. AV Valves Ans: Tricuspid: closes right atrium Orifice, has anterior, posterior and septal cusps which are alla tached to annulus fibrosus at their base. Blood flows anteriomedially. Has papillary muscles. Mitral: only has anterior and posterior cusps that are attached to chord tendinae and Annulus fibrosus. Has papillary muscles. Semilunar Valves. Ans: Pulmonary: is tricuspid and has anterior, right and left cusps, each forms a pulmonary sinus Arterial: Has 2 cusps, posterior, right and left. Between which aortic sinuses are found (posterior is a non coronary sinus). Has aortic vestibule which is the portion of ventricle immediately before aortic rifice, this is smooth fibrous tissue and