182 



THE CIRCULATION 



TOPICAL OUTLINE 



HEART 



f Right Cavity 

 I Left Cavity 



Right Auricle 



CAVITIES OF 

 THE HEART 



Right Ventricle . 



Left Auricle 



Left Ventricle 



BLOOD- 

 VESSELS 



Arteries 



Capillaries 



Veins . 



Right auricle j Between these the tri- 

 Right ventricle ) cuspid valve. 

 Left auricle ) Between these the bicus- 

 Left ventricle \ pid or mitral valve. 

 Thin irregular walls. 



f Vena cava superior from upper 



parts. 



Vena cava inferior from lower 

 . parts. 



Coronary vein which returns 

 the venous blood from the 

 [ heart walls. 

 Thick walls. 

 Papillary muscles. 

 Chords^ tendineae. 

 Three cusps form the tricuspid valve. 



Vessels 



Vessels 



Right pulmonary 

 artery to right Semilunar 

 lung. valves just 



Left pulmonary j belowjunc- 



artery to left | tion. 

 . lung. 

 [ Thin irregular walls. 



r Right pulmonary vein from 



Vessels r ri " ht Iun 9- 



Left pulmonary vein from left 



{ lung. 

 ( Very thick walls. 

 Papillary muscles. 

 Chordse tendinese. 

 Two cusps form the bicuspid or mitral 



valve. 



Vessel The aorta to all parts. 

 Semilunar valves at its origin. 

 Coronary arteries com- ] Supply wails of 

 mence just outside the } heart with 

 semilunar valves. J blood. 

 Take blood from the heart. 

 f 1. Outer areolar. 



2. Middle muscular and elastic 

 Coats ' } -thick. 



[ 3. Inner epithelial. 



Assist in propelling blood by their elastic 

 ( recoil. 



f Connect small arteries with small veins. 

 j. Arranged like networks. 

 1 Very thin walls. 

 ( Diameter about scVo inch. 

 (- Convey blood to the heart. 

 | Coats same as in arteries, but less mus- 

 ^ cular and elastic tissue, 

 j Generally provided with valves like the 

 semilunars. 



