^00 RESPIRATION. 



merous lymphatic or conglobate glands , carefully to be distin- 

 guished from a neighbouring order of glands, called bronchial, 

 that are supplied with an excretory duct opening into the mucous 

 membrane of the bronchiae, and are of the conglomerate kind.? 



" The thorax, which contains the lungs, has an osseous and car- 

 tilaginous framework," narrow above and broad below, " somewhat 

 resembling a bee-hive, throughout very firm and stable, but in 

 every part more or less movable for the purpose of respiration." 01 



The framework is the twelve dorsal vertebrae, forming a column 

 convex externally, concave in front; the twenty-four ribs, also 

 convex externally and concave within; and the sternum: all the ribs 

 are united at one extremity by a joint with the dorsal vertebrae ; 

 the seven highest ribs are connected at their other extremity 

 with the sternum by means of a cartilage, larger and longer in 

 each lower rib, just as each of the seven ribs is longer than the 

 rib above it (true or sternal ribs), and the three next are each 

 united by cartilage with the cartilage of the rib above (false 

 or asternal ribs), and the two lowest have their anterior ex- 

 tremity unattached (floating false or asternal ribs). When the 



, vertebrae of spinal column. 



b, sternum. 



c, ensiform cartilage. 



" Ibid. tab. xxi." 



p " Consult Portal, Mem. de VAcad. des Scienc. de Paris. 1780." 



* " J. G. Amstein (Praes. Oetinger), De usu et actione muscular, intercostal. 

 Tubing. 1769. 4to. Theod. Fr. Trendelenburg, Jun. De sterni costarumque in 

 respiratione vera genuinaque motus ratione. Getting. 1779. 4to. 



Bordenave and Sabatier, Mem, de VAcad, des Scienc. de Parh. 1778." 



