1
.
| Azygos vein (divided) |
2
.
| Right main bronchus |
3
.
| Tracheobronchial lymph node |
4
.
| Cardiac plexus |
5
.
| Right pulmonary artery |
6
.
| Incision in epicardium to display interatrial cleavage plane |
7
.
| Myocardium of left atrium (overlying upper right pulmonary vein) |
8
.
| Nerve filament of cardiac plexus |
9
.
| Area of intermingling atrial muscle fasciculi |
10
.
| Sino-atrial node |
11
.
| Fossa ovalis |
12
.
| Wall of right atrium |
13
.
| Pericardium |
14
.
| Right phrenic nerve |
15
.
| Ascending aorta |
16
.
| Superior vena cava (retracted) |
17
.
| Left coronary artery |
18
.
| Latex cast within left ventricle |
19
.
| Interventricular septum |
20
.
| Border of fossa ovalis |
21
.
| Right ventricle |
22
.
| Latex cast within inferior vena cava |