1
seperates the left and right atria
2
this valve prevents back flow of the blood from the ventricles to the atria
3
a groove on the external surface of the heart and marks the division between the superior atria and the inferior ventricles
4
keeps the heart in place, limits the motion and prevents it from over expanding
5
pumps deoxygenated blood from the atrioventricular (tricuspid) valve into the right ventricle
6
helps to prevent resistance as blood passes through the vessels and chambers of the heart
7
this is the heart muscle - thin in the atria and thick in ventricles
8
pumps oxygenated blood from the atrioventricular (bicuspid) valve in to the left ventricle
9
this valve prevents the back flow of blood from the pulmonary trunk and the aorta to the right ventricle and left ventricle respectively
10
the ventricles are the two lower chambers of the heart positioned near its _____
