THE CIRCULATORY OR VASCULAR SYSTEM \2Q 



The Vertebral and Spinal Veins. The plexuses 

 of veins of the vertebral column and spinal cord are: 

 The dorsispinal, meningorachidian, and medulli spinal. 



FIG. 65. Veins and arteries of the thoracic and abdominal cavities : I, 

 Root of right lung ; 2, section of diaphragm ; 3, suprarenal body ; 4, kidney ; 

 5, psoas magnus muscle ; 6, quadratus lumborum muscle ; Aa, descending 

 aorta; a A, arch of aorta ; Ab, innominate artery; cs, left carotid artery; 

 Ss, left subclavian artery ; c, celiac artery ; mes, mei, superior and inferior 

 mesenteric arteries ; cs, ci, superior and inferior venae cavae ; Abd, Ads, right 

 and left innominate veins; S, subclavian vein ; je,ji, external and internal 

 jugular; az, vena azygos major ; ic, intercostal vein ; h, hepatic veins; phr, 

 phrenic vein and artery ; sr, suprarenal vein ; r, renal artery and vein ; Ib, 

 lumbar vein ; spi, internal spermatic artery and vein ; sm, middle sacral 

 artery and vein ; at, common iliac artery and vein ; H, hypogastric artery 

 and vein ; /, iliac artery and vein (after Henle). 



The Cardiac Veins. These veins return the blood 

 from the muscular structure of the heart. They are 

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