LIST OF ABBREVIATIONS. 325 



1. The afferent vessels ( W. cavm) of tlie former come from the body in general, those 

 of the latter ( VV. pulmonale^) from the lungs. The efferent vessels of the former {AA. 

 pulmonales) go to the lungs, and those of the latter {aorta) to the hody in genend. 



2. From two of the aortic sinuses of Valsalva arise the two AA. cardiacoi which are 

 distributed to the substance of the heart itself. 



3. Into the right auricle open the VV. cardiaccB which come from the substance of the 

 heart. 



4. The septal wall of the right auricle presents an oval depression, fossa ovalis, the 

 indication of a thin portion of the septum which, in the foetus, was absent, so as to permit 

 the existence oi the foramen ovale (§ 8(58). 



5. The lateral walls of the left ventricle are, upon the whole, from two to three times 

 the thicker. 



6. The riglit ventricle is prolonged as a conus arteriosus from which arises the A. pul- 

 monalis. 



7. The aurieulo -ventricular valves on the right form three divisions, hence named VV. 

 tricusjndes, while those of the left form two, hence named bicuspides or mitral. 



8. The foregoing are real and constant distinctions between the right and left hearts. 

 In addition, in the diagram, on the left side, the semilunar valves are represented as closed, 

 forming bags whose convexities bulge toward the ventricle as if pressed upon by a column 

 of liquid in the artery ; the tricuspid valves are also closed, as if by the pressure of a vol- 

 ume of liquid in the ventricle ; they are restrained from being carried into the auricle by 

 the chordae tendinece. 



§ 849. List of Abbreviations of Cardiac Names. — Ac, Aorta, 

 § 851. — Arc. ao., Arcus aorticus, § 854.— A. Ijrcpli., Arteria brachio- 

 ceplialica, § 855. — A. crd., Arteria cardiaca, § 856. — A. ij>lin., Ar- 

 teria pulmonalis, § 857. — A. sbclv., Arteria subclavia, § 858. — Aur. 

 dxt., Auricula dextra, § 859. — Aur. sin., Auricula sinistra, § 860. — 

 Chd. tnd., Cliordse tendiuese, § 864. — Clm. car., Columnse carnege, 

 § 865. — Con. art, Conus arteriosus, § 866. — Dct. art.. Ductus ar- 

 teriosus, § 867. — Fs. ov.j Fossa ovalis, § 868. — Orf. aur-vnt., Oriti- 

 cium auriculo-ventriculare, § 870. — Pcv., Postcava, § 871. — Prcv., 

 Prsecava, § 872. — 8pt. aur.. Septum auriculare s. auricularum, 

 § 870. — 8pt. vnt. Septum ventriculare s. ventriculorum, § 874. — 

 Sri. aur. dxt. Sinus auriculse dextrse, § 875. — 8n. aur. sin.. Sinus 

 auriculae sinistrse, § 876. — Sn. cor. s. crd., Sinus coronarius s. car- 

 diacus, § dni.—Sn. Vals., Sinus Valsalvae, § 878.— Tbcl. Low., 

 Tuberculum Loweri, § 880. — Vh. Mc, Valva bicuspis, § 881. — 

 Vlv. slmr., Valva semilunaris, § 882. — Vlv. TJib., Valva Tliebesii, 

 § 883. — Ylv. trc, Valva tricuspis, § 884. — Y. az.. Vena azygos, 

 § 885. — Y. crd., Vena cardiaca s. coronaria, § 887. — Y. cv.. Vena 

 cava, § 886. — Y. plm., Vena pulmonalis, § 888. — Ynt. dxt., Ventric- 

 ulus dexter, § 889. — Ynt. sin., Ventriculus sinister, § 890. 



§ 850. Descriptive List of the Parts of the Heart. — The be- 

 ginner may find it advisable to read over this list with reference to 



