: nnm.\.\. 

 2. /; 



71 



'i'li.' number i-r ribs varies like I hat of the il.>r.-:il \< rt.-ln-.-i-. I'll, t'.ill.iwing table 

 indicates tlie number of these l> >ms in tin- dill'eiciu cluinr.-ti.Mtrl animals. 



I'ig . 

 nx 



Sheep. 



Goat . 

 Dog . 



II 

 III 

 13 

 111 



Ki MINANTS. These animals have eight sternal and five asternal ribs. 

 In the (>.i-, they are longer, wider, ami less arched thiin in soli|>e,ls. The articular 

 eniincnces of the sup.-iior extremity are voluminous and well detach, d ; the neck 

 :illy i* v.-ry Ing. The sternal ribs are joined to their cartilage \ pr.>l>ngment hy 

 a r. al diarthrodial articulation. In the last rib, and soim -times in the our IK (on- it, 

 thr tuU-roMty i.s M-arcely pcra ptible, and ha* no artienlar facet. In the <S/i-.-y; an i 

 the ,-ternal ribs an- consolidated with the cartilages (see fig. .">.) 



In this anim .1 then- ;ire fourteen jmir.-* of ribs, seven of which are sternal ami 



:i;il. The first aie ju-ovided with eartilnures of prolongment rlatteiied on both 



mely wide and sharp, and ounvex on tli-ir superioi- bonl.-r. In the. four last 



;al rilis, the facet of their tuberosity is confounded with the jwsterior facet of the 



la ad. (Otherwi.-e, t..e ribs of the 1'ii; resemhle, in their general conformation, those of 



the Shri-ji <>T (ic at ; I hough more incnrvuted mid wider.) 



CAKM\<II:A. They possess thirteen ribs Fig. 39. 



'ii i-a-h --idr nine strnal and four asternal. .. , 



are very much arched, narrow, and 

 thi.'k. and their curtilages rarely ossify. In 

 the li'xj. the articular facet of the tubeiosity 

 remains isolated from the posterior facet of 

 ;id in all the ribs. It is absent in the 

 three, last ribs of the Cut. 



coMl'AIIISON OF THE THORAX OF MAX WITH 

 THAT OF THE DOMESTICATED ANIMALS. 



1. Slernum. 



The bternum of Man is flattened before 

 and behind, and diminishes in width from 

 to below The xiphoid appendage is 

 narrow, and single or bifid. Besides the 

 articular surfaces for the ribs, there are found 

 on tin- n|ijM-r end two lateral notched for 

 aitii-ulation with the clavicles. 



2. Uil*. 



Of the twelve ribs in Man, seven are 

 bternals and five asternals. They are 

 chott. narrow, and much incurvatetl, especially 

 the lir.-t ones. In each rib the curvature is 

 inor.- marked in the posterior fourth ur fifth 

 th:t!i in the aiit.rinr three-fourths or four- 

 fifths: this sudden change of curvature is 

 aed in the external face by a kind of 

 inflexion and thickening called the angle of 

 the ri i r iloiiging cartilages of the 



eleventh ami tw. Ifth ribs are short, and arc 

 the texture of the abdominal pari.-te-: 

 for this r. as .11 th y are termed the floating (or 

 falte) rlbt (see fig.>J). 



THORAX OF MAN ; ANTERIOR FACE. 



1, Superior piece of the sternum : _'. 

 Miil-lb- pi.-,,-, i-r body; 3, Inferior pi--... 

 or ensitbrm cartila^i*; 4, Fir-t dond 

 v.-rt.-lir.-i; .". I-.i-t .Im-sal vortebra; 0, 

 Kir -I rib; 7. Its head; 8, lt> Mdt, Mt- 

 ing against th.- triii^v.-r-f procvs.s of the 

 tir.st .l.ir>;d v.-rt.'l,r;i : '.'. It^ t ulicrcb- : 1", 

 S-v.'Uth, .r l.i-t true rib; 11, Costal i-ar- 

 tilageM'f tin- trin- ril.>; U. Th- 1 i>t t\\,. 

 I'll-,- or tlonting ribs; l:l. The groove 

 along the lower border of the rib. 



ARTICLK IV. ANTERIOR LIMP.-. 



Tlic /////'/(..! thoracic) limb is divided int.> i'\\r sc ounliry regioiis : 



:i;i. r,.ie--;nn. and f,.iv fin-t or hand. 



