THE HEART AND GREAT VESSELS. a AS )aL 
Fic. 804. ”, Fic, 805. ( 
Fie. 806. Fic. 807. 
From photographs of a formalin-hardened subject, with the heart dissected in situ, to show the relations of its 
cavities and valves to the anterior wall of the thorax. 
In Fig. 804 the anterior wall of the right ventricle has been removed and the pulmonary artery opened. 
In Fig. 805 the anterior walls of the ascending aorta and of the right auricle have been removed ; also the 
anterior cusp of the tricuspid valve. 
In Fig. 806 the greater part of interventricular septum has been removed, exposing anterior cusp of mitral 
valve. J & 
In Fig. 807 the ascending aorta, anterior cusp of mitral valve, trunk of pulmonary artery, and interauricular 
septum have been removed ; the cavities of left auricle and left ventricle are exposed, also the left 
auricular appendix and posterior cusp of mitral valve. 
R.A. Right auricle. P.A. Pulmonary artery. M.V. Mitral valve. b 
R.V. Right ventricle. P.V. Pulmonary valve. §.V.C. Superior vena cava. 
L.A. Left auricle. A. Aortic arch. P.V. Pulmonary vein (in Fig. 807). 
L.A.A. Left auricular appendix. A.V. Aortic valve. M. Moderator band. 
S.V.  Interventricular septum. T.V. Tricuspid valve. ( 
