AND PHYSIOLOGY. 



207 



Fig. 210. 



A View of the Heart, with the Great Vessels of the Neck in Situ. 1, Eight Ventriclo 

 of the Heart. 2, Eight Auricle. 3, Left Ventricle. 4, Left Auricle. 5, Pulmonary 

 Artery. 6, Arch of the Aorta. 7, Descending Vena Cava at its entrance into the Eight 

 Auricle. 8, Ascending Vena Cava. 9, Thoracic Aorta. 10, Arteria Innominate, 11, 

 Eight Brachiocephalic Vein. 12, Left Brachiocephalic Vein. 13. Section of the Sub- 

 clavian Artery. 14, Section of the Sub-Clavian Vein. 15, 15, Primitive Carotid Ar- 

 teries. 16, 16, Internal Jugular Veins. 17, 17, External Jugular Veins. Between 

 these Veins is seen the Section of the Sterno-Cleido-Mastoid Muscle. 18, The Trunk 

 formed by the Superficial Cervical Veins, known sometimes as the Anterior Jugular 

 Vein. 19, A Branch from it to the Facial. 20, Main Trunk from the Inferior Thy- 

 roid Veins. 21, Superior Thyroid Vein. 22, Transverse Cervical Artery and Vein. 

 23, Lingual Artery and Vein. 24, Facial Artery and Vein. 



The Innominata on the right very soon becomes the Sub- 

 clavian, after which the corresponding arteries of both arms 

 receive the same name. The Sub-clavian Artery, as its ety- 

 mology implies, lies directly beneath the clavicle until it 

 reaches the axilla, or arm -pit, where it receives the name of 



The Sub-clavian ? The Axillary ? 



