1
.
| Pectinate muscles in reflected part of atrial wall |
2
.
| Sinus of vena cava |
3
.
| Inferior vena cava |
4
.
| Valve of inferior vena cava |
5
.
| Coronary sinus (covered by muscle fibers continuous with atrial myocardium) |
6
.
| Upper pointer: Valve of coronary sinus Lower pointer: Latex cast in opening of coronary sinus |
7
.
| Left ventricle (myocardium exposed) |
8
.
| Posterior interventricular sulcus |
9
.
| Middle cardiac vein |
10
.
| Interatrial septum |
11
.
| Fossa ovalis |
12
.
| Border of fossa ovalis |
13
.
| Position of atrioventricular node (covered by endocardium) |
14
.
| Septal (medial) cusp of tricuspid valve |
15
.
| Right atrioventricular opening |
16
.
| Anterior cusp tricuspid valve |
17
.
| Myocardium right atrium |
18
.
| Coronary sulcus |
19
.
| Right coronary artery |
20
.
| Right ventricle (myocardium exposed) |