624 



THE BLOOD-VASCULAR SYSTEM OF THE OX 



The middle cervical lymph glands comprise a series of small nodes along the 

 dorsal face of the trachea. 



In the sheep and goat there is a lymph gland at the middle of the neck, in the angle between 

 the spinalis and complexus, covered by the splenius. It receives vessels from the atlantal gland 

 and sends efferents to the prescapular gland. 



The prescapular or superficial cervical lymph gland is situated at the anterior 

 border of the supraspinatus under cover of the mastoido-humerahs and omo-trans- 

 versarius. It is elongated and may be an inch or more in width and four or five 

 inches long. Two occur in exceptional cases. 



A chain of hajmolymph glands lies along the front of the shoulder, covered above by the 

 trapezius. Others are frequently found (in the calf especially) on the surface of the omo-trans- 

 versarius at the point where it passes under the mastoido-humeralis (Forgeot). 



The posterior cervical or prepectoral lymph glands number commonly three 

 or four on each side. One or two are placed on the brachial vessels, one below^ the 



Fig. 47S. — Superficial Lymph Gl.\nds of Cow Projected on Surface of Body. 

 1, Submaxillary; 2, subparotid; S, atlantal; 4, parapharyngeal; 5, anterior cervical; 6, middle cervical; 7, pre- 

 scapular; 8, precrural. (With use of fig. in EUenberger-Baum, Anat. f. Kdnstler.) 



brachial vein at the first rib, and one at the junction of the common trunk of the 

 external and subcutaneous thoracic veins with the l)rachial. 



The intercostal lymph glands are situated, as in the horse, at the upper parts 

 of the intercostal spaces. Associated with them are haemolymph glands. 



The sternal lymph glands are situated along the course of the internal thoracic 

 artery at the lower i)art of the intercostal spaces. The largest is close to the 

 thoracic; inlet. Several glands occur in the fat about the apex of the pericardium. 



4. Several anterior mediastinal lymph glands are placed along the asophagus 

 and the trachea.^ Hiemolyinph glands occur here also. 



Usually three large bronchial lymph glands are present (Fig. 289). One is 

 situated at the origin of each chief bronchus and the third is under the trachea at 

 the origin of the special bronchus of the apical lobe of the right lung. Another 



' The upper series is continuous with the posterior mediastinal ((rsophageal) glands and the 

 lower or tracheal glands with tlic bronchial. Hence we might well designate the mediastinal 

 glands as oesophageal (anterior and posterior) and tracheo-bronchiah 



