1
.
| Myocardium of anterior wall of right ventricle (cut and elevated) |
2
.
| Posterior cusp tricuspid valve |
3
.
| Septal (medial) cusp of tricuspid valve |
4
.
| Chordae tendineae |
5
.
| Epicardium of right ventricle |
6
.
| Posterior papillary muscle |
7
.
| Trabeculae carnae |
8
.
| Anterior papillary muscle (attached to reflected flap of ventricular wall) |
9
.
| Left pointer: Fossa ovalis Right pointer: Border of fossa ovalis |
10
.
| Right auricle |
11
.
| Right atrioventricular opening (arrow on drawing indicates interior of right atrium beyond opening) |
12
.
| Anterior cusp tricuspid valve |
13
.
| Supraventricular crest |
14
.
| Area in which right branch of A-V bundle descends into right ventricle (covered by endocardium) |
15
.
| Septomarginal trabecula (moderator band) |
16
.
| Septal papillary muscles |