THE LUNGS. 



1093 



Groove caused 

 by the first rib 



Subclavian sulcus 

 Groove caused 

 by the first rib 



Lower lobe 



Cardiac notch 



Lower lobe 



neck. The subclavian artery arches laterally on its medial and ventral aspects a 



short distance below its sum- Trachea 



mit, and a groove, the sulcus subclavian suicus 



subclavius, corresponding to 



the vessel, is apparent upon it. 



At a lower level on the apex 



pulmonis a shallower and wider 



groove upon its medial and 



ventral aspects marks the 



position of the innominate 



vein. Although these vessels 



impress the lung they are 



separated from it by the cupula 



pleurse. 



The diaphragmatic surface, 

 or base of the lung, presents a 

 semilunar outline,being curved 

 around the base of the peri- 

 cardium. It is adapted to the 

 thoracic surface of the dia- 

 phragm, and is consequently 

 deeply hollowed out. As the 

 right cupola of the diaphragm 

 passes further upwards than 

 the left, the basal concavity of the right lung is deeper than that of the left 



lung. Laterally and 



,-^^f ^^ Groove for left subclavian artery dorsally, the dia- 



M %. Groove for ,ea phragmatic surface of 



JH |m/ innominate vein each lung IS limited 



K\ by a thin salient mar- 



L ,. Groove for first rib gin, called the inferior 



OLBBaiiEBJ border or margin, which 



e oTaoS' Ik. Groove f 0r tissue extends downwards for 



*&. in mediastinum, some distance in a 

 narrow pleural recess, 



j^Jl^JdS the sinus phrenico- 



Left pulmonary ,JH -4B COStalis, between the 



diaphragm and the 

 chest -wall. This in- 

 ferior border of the 

 lung extends further 

 downwards on the 

 lateral side and dorsally 

 than it does ventrally, 

 but it falls consider- 



Hgament mi, BH; ably short of the bot- 



tom of the phrenico- 

 |H\, B^--notch ac costal sinus. Thus, 



after expiration, it 

 reaches the inferior 

 mr border of the sixth rib 



in the mamillary line ; 

 the eighth rib, in the 

 axillary or mid-lateral 



Fir;. 870. MEDIAL SURFACE OF A LEFT LUNG HARDENED IN SITU. line; whilst dorsally 



it proceeds medially 



t along a straight horizontal line so as to reach the vertebral column at the level 

 of the extremity of the spine of the tenth thoracic vertebra. During respiration 

 the thin inferior border moves freely in a vertical direction within the phrenico- 



pulmonary 

 artery 

 Upper left 

 pulmonary vein 

 Left bronchu 



Lower left 

 pulmonary 

 vein 



Pulmonary 

 ligament 



FIG. 869. THE TRACHEA, BRONCHI, AND LUNGS OF A CHILD, 



HARDENED BY FORMALIN INJECTION. 



Groove for 

 .comas 

 arteriosus 



