Right atrium

Right atrium
- Right auricle of heart
  - Pectinate muscles of right atrium
- Crista terminalis
- Smooth part of right atrium
  - Sinus of venae cavae
    - Opening of superior vena cava
    - Opening of coronary sinus
    - Valve of coronary sinus
    - Opening of inferior vena cava
    - Valve of inferior vena cava
  - Body of right atrium
  - Vestibule of right atrioventricular valve
    - Triangle of atrioventricular node
    - Openings of smallest cardiac veins
- Cavotricuspid isthmus