This vessel, as we have previously pointed out, is a branch of the right axillary and runs forward beneath the trachea until it reaches the entrance to the chest, where it divides into a right and left carotid artery.
Fig. 193. - Diagram of Circulation.
H, Posterior Mesenteric Vein. 1 Pulmonary Vein.
8 Anterior Mesenteric Artery. 9 Renal Artery.
10 Spermatic Artery. 11 Posterior Mesenteric Artery. L.K., Left Kidney. R.K., Right Kidney, dia., Diaphragm, e.l. , Right Lung. L.L., Left Lung. K.V., Right Ventricle. L.v., Left Ventricle. STOM., Stomach. SP., Spleen.