r)30 TIIK ORdAXS OF ClRClLATIOX 



the vena Galeni (right marginal), usually open, b.low the superior cava, en the 



''^^'xhe'cavityof the right auricle is smooth, except upon its anterior wall, and 

 within 'iH M.p.ndix, whore it is ridged with muscular bands (the muscuh 

 nect^^nati) w ich terminate, aix.ve, along a ridge, the crista termmahs . 



^ T IK er kta terminalis corresponds externally with a sulcus, the sulcus termi- 



K„. -,49-\NTEKIUK VIKW OK THE RiOHT CHAMBERS OF THE HEART, WITH THE 



■ Great Vessels. 



Left carotid 



Innomiiiale 



Arcli of Aorta 

 Vfiia cara siij/erior 



RIGHT AURICULAR 

 APPENDIX 



Orifice of vein 

 of Galen \ 



ANNULUS OVAL] 



Left siiliclarian 



Jii(//tl pulmonary a.rtery 

 .' Ductus arteriosus 



Left ptiliiKiunry artery 



Pulmotiari/ artery 

 Pulmonary semilunar valves 



LEFT AURICULAR APPENDIX 



Small papillary muscle connected 

 with septum 



tl Columna carnea 

 X • CHORD/E TENDINE/E 



Anterior papillary 

 muscle 



Left coronary artery 



FOSSA OVALIS 



T'cjia card inferior jj^^g 

 ANTERIOR SEGMENT OF TRICUSPID VALVE 



RIGHT SEGMENT OF TRICUSPID VALVE 



SECTION OF VENTRICULAR WALL 



Vena cara inf 



3 Posterior papil- 2 Columna carnea 

 lary muscle 



nalis which runs across the auricle from the front of the superior cava to the left 

 of the inferior cava, and both the groove and the ridge indicate the line ot union 

 of the sinus venosus of the fretus Avith the auricle proper. 



\t the lower part of the posterior wall or septum which dividi'S the two aiincltjs, 

 and just above the orifice 'of the inferior cava, is a smooth oval depression, the 

 fossa ovalis. It marks the position of the opening in the f(vtal heart, to he 

 descrilied hereafter; and is bounded bv a well-marketl rounded edge, the annulus 



