114 ANATOMY. 



Digital, 4 oranches supplying the sides of the 3 outer toes and the outet 

 side of the 2d toe ; its inner side, together with the great toe, being sup- 

 plied by the Digital Branches of the Dorsalis Pcdis Communicating. 



Describe the Pulmonary Artery. It alone of the arteries carries venous 

 blood, which it conveys from the right side of the heart to the lungs. It is 

 only about 2 inches long, and nearly all within the pericardium ; arising from 

 the right ventricle in front of the ascending aorta, passing upwards and back- 

 wards to the under surface of the arch of the aorta, where it bifurcates, and is 

 connected to the aorta by a fibrous cord, the remains of the ductus arteriosus 

 of the foetus. Its terminal branches are the 



Right and Left Pulmonary Arteries, the latter being the shorter of the two ; 

 pass horizontally outwards to the roots of their respective lungs, where each 

 divides into two branches, which again and again subdivide to ramify through- 

 out the lung tissue and end in the capillaries of those organs. 



ARTERIAL ANASTOMOSES. 



Describe the Anastomosis around the Shoulder-joint. It is formed by 

 the following S arteries, viz. 



Posterior Scapular, br. of transv. colli. Sitprascapular, br. of thyroid axis. 

 Subscapular, br. of axillary. Ant. Circumflex, br. of axillary. 



Dorsalis Scapulce, br. of subscapular. Post. Circumflex, br. of axillary. 



Infraspinous, br. of dorsalis scapulae. Acromial, br. of acromio-thoracic. 



What Arteries Anastomose around the Elbow-joint? The 

 Superior Profunda, br. of brachial. Radial Recurrent, br. of radial. 

 Inferior Profunda, br. of brachial. Recurrent Interosseous, br. of posterior 

 Anastomotica Magna, br. of brachial. interosseous. 



Posterior Articular, br. of superior Anterior Ulnar Recurrent, br. of ulnar. 

 profunda. Posterior Ulnar Recurrent, br. of ulnar. 



What Arteries Anastomose around the Hip-joint ? They are the 

 Gluteal, Ilio-lumbar, and Circumflex Iliac, with the External Circumflex. 

 Obturator and Sciatic, with the Internal Circumflex. 

 Comes Nervi Ischiadici, with the Perforating branches of the Profunda. 



Name the Arteries Anastomosing around the Knee-joint. The 

 Descending, br. of ext. circumflex. Sup. Int. Articular, br. of popliteal. 



Anastomotica Magna, br. of femoral. Inf. Ext. Articular, br. of popliteal. 

 Inferior Perforating, br. of profunda. Inf. Int. Articular, br. of popliteal. 

 Superior Ext. Articular, \x. of popliteal. Recurrent Tibial, br. of anterior tibial. 



How is the Collateral Circulation established after Ligature of thte 

 Carotid or Subclavian ? By the following anastomoses, viz. 



Superior Thyroid, br. of external carotid, with the Inferior Thyroid, br. of 

 the thyroid axis, from the subclavian. 



