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LABORATORY MANUAL OF HUMAN ANATOMY 



(a) Coronary sinus (sinus coronarius). 



Open it with scissors throughout its entire length. 



(aa) Large vein of heart (V. cordis magna) (0. T. great cardiac 



vein). 



(ab) Posterior vein of left ventricle (V. posterior ventriculi sin- 



is tri). 



(ac) Oblique vein of left atrium (V. obliqua atrii sinistri [Mar- 



shalli]). 



Note the embryological significance of this vein. Can 

 you find the ligamentum V. cavae sinistrae in the fold of 

 epicardium known as the " vestigial fold of Marshall" f 



FIG. 208. 



Vena azygos 



Atrium sinistrum 



V. cava superior 

 Arcus aortae 



A. pulmonalis 



Ventriculus dexter 



Incisions to open the right atrium of the heart. (After Cunningham, Man. of Pract. Anafc, Edinburgh, 

 18%, 2d ed., vol. ii. p. 47, Fig. 182.) 



(ad) Middle vein of heart (V. cordis media). 



(ae) Small vein of heart (V. cordis parva). 



(b) Anterior veins of heart (Vv. cordis anteriores], to right atrium, 

 brainiest veins of heart (Vv. cordis minimae) (0. T. Vv. Thebesii). 



