A large groove that runs around the heart, and separates the atria from the ventricles, is theMultiple Choiceposterior interventricular septum.anterior interventricular septum.coronary sulcus.cardiac fissure.coronary sinus.

The atria of the heartMultiple Choiceare separated from each other by the interventricular septum.function primarily as reservoirs for blood collection.receive blood from the aorta and pulmonary trunk.function primarily as the pumps of the heart.All of the choices are correct.

Sudden occlusion of the anterior interventricular branch of the left coronary arterywill lead to infarction of this part of the heart wall.A. Part of the right atriumB. Anterior two -third of the interventricular septumC. Le ft atri umD. Posterior on e- thi rd of the interventricular septumE. Atrioventricular nod e

Youposterior surface (base) of heart:a) contains posterior interventricular grooveb) contains middle cardiac veinc) is formed by the right atrium and right ventricled) is related to the esophagus

The atrioventricular node a. Is connected to specialized wide, fast conducting myocytes in the bundle of His and Purkinje fibres b. Delays impulses for about 200 ms, allowing time for atrial contraction to complete ventricular filling c. Is a band of fibrous connective tissue which separates the atria from the ventricles d. Conducts impulses rapidly allowing almost immediate activation of ventricular muscle

The opening of coronary sinus empties into what chamber of the heart?Group of answer choicesLeft atriumleft ventricleRight atriumRight ventricle