172 



THE CIRCULATION 



TOPICAL OUTLINE 



HEART 



C Right Cavity 

 Left Cavity 



Right Auricle 



Right Ventricle 



CAVITIES OF 

 THE HEART 



j Right gw/qte- Between these the tri- 

 i Right^ventrisle f cuspid valve. 

 j Left auricle ' ( Between these the bicus- 

 < Left ^entricle i pid or mitral valve. 

 f Thin irregular walls. 



'Vena cava superior from upper 



Vessels 



Left Auricle 



Left Ventricle 



BLOOD- 

 VESSELS I Capillaries 



Veins. . 



parts. 

 Vena cava inferior from lower 



parts. 

 Thick walls. 

 Papillary muscles. 

 Chordss tendinese. 



Three cusps form the tricuspid valve. 

 Right pulmonary 

 artery to right 

 lung. 



Left pulmonary 

 artery to left 

 lung. 

 f Thin irregular walls. 



( Right pulmonary vein from 



Vessels 



Semiluna>r 

 "valves "Just 



below june- 



tion. 



[ Vessels { ^lUA"*-* 1 **^^* ~ 



j Left pulmonary vein from left 

 I ftmr. 



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 commence just outside 

 the semilunar valves. 



Take blood from the heart. 

 Outer areolar. 

 Middle muscular and elastic 



thick. 

 I 3. Inner epithelial. 



Assist in propelling blood by their elastic 

 recoil. 



ijQonnect small arteries with small veins. 

 Arranged like networks. 

 Very thin ivalls. 

 Diameter about 3 oW inch. 

 f Convey blood to the heart, 

 j Coats same as in arteries, but less muscu- 

 lar and elastic tissue. 



Generally provided with valves like the 

 semilunars. 



Coats 



