THE PLEURiB 



527 



Dor so-scapular ligament Ligamentum nuchas 



Tra pczius 

 Rhoniboideus 



Cartilage of scapu 



Pectoralis profundus 

 {p. scapularis) 



Pectoralis superficlalls 

 [p. transversa) 



Longissimus dorsi 

 Mullifidus 

 Serratus ventralis 



_ Longissimus 

 costarum 

 Levator costm 



Subscapularis 

 Infraspinatus 



Cutaneus 

 Teres major 



Deltoideus 

 Triceps 

 (c. longum) 



Triceps 

 (c. laterale) 



Coraco-brachialis 



Brachialis 

 Pectoralis prof. 

 (p. humeralis) 

 Extensor carpi 

 radialis 

 Biceps brachii 



Fig. 469. — Section of Thorax op Horse. 



The section is cut in an oblique direction corresponding with the .spine of the scapula. It passes through the fourth 

 thoracic vertebra and a httle more than an inch behind the shoulder joint. The pleural cavities, indicated by wide 

 black hues, are exaggerated for the sake of clearness. 



1, Pleural cavities (number i.s placed in mediastinum) ; 2, 2', lungs; 3, oesophagus; -1, trachea; .5, brachioceph,alic 

 trunk; 6, anterior vena cava; 7, thoracic duct ; 8, 8', vagi; 9, left recurrent nerve; 10, 10', phrenic nerves; 11, internal 

 thoracic vessels; 12, sympathetic trunk; 1.3, subcostal vessels; 14, external thoracic vessels; 15, brachial vein; 16, 

 brachial artery; 17, radial nerve; 18, ulnar nerve; 19, musculo-cutaneous nerve; 20, median nerve; 21, subscapular 

 vessels; a, m. longus colli; b, m. rectus thoracis; c, m. transversus thoracis; d, m. intereostalis internus; 5, sternum; 

 H, humerus. Ventral to the trachea there are shown, but not marked on account of lack of space, two cardiac nerves 

 and a mediastinal lymph gland. 



