ANATOMY IN A NUTSHELL. 



457 



plies the testicle. Each artery anastomoses with the artery of the vas deferens 

 and the cremasteric artery. In the female these arteries are called the ovarian. 

 They are shorter than the spermatic and do no1 pass out of the abdominal cav- 

 ity. They rim between the layers of the broad ligament of the uterus to the 

 ovary and the round ligament and Fallopian tubes. Branches are given off 

 which follow the round ligament through the inguinal canal to the integument 

 of the labium and groin. 



PLATE CCXLV 



°TERYG0ID FOSSA 



,'fl\^ ~ TENSOR PALATI 



^ INTERNAL PTERYGOID 



SUPERIOR CONSTRICTOR 



The Pterygoid Processes. 



LESSOX CXLIV. 



Muscles of the Thorax. 



External intercostal*. — Description. — Then are eleven of these on each 

 side, extending from the tubercles of the ribs posteriorly to the commencement 

 of the cartilages of the ribs anteriorly. From the ant t rior < xtremity of the mus- 

 cle the anterior intercostal membrane extends forward to the sternum. The 

 fibers of the External intercostals pass downward and forward like tin fib 

 the External oblique muscle of the abdomen. A firm layer of fascia covers the 

 outer surface of the External intercostal aswell asthe inn; r surface of tin In- 

 ternal intercostal muscles. The middle im< rcostal fascia, which is more deli- 

 cate than either of the oth< rs, is placed b< I \v< < n the two set> of muscl< s. The 

 Intercostal fascia' are best shown In twe< n the External intercostal muscles and 

 rn ui n anteriorly and b< tw< en the I nit rnal int< rcostals and the spine pos- 

 teriorly, for in th< m situations tin- muscular fiU rs arc d< fici< at. 



Origin. — From the lower border of each rib < xtending from the tubercles 

 to the commencemi nt of the cartilag* s. 



Insertion. — Into the upper bord< r of the rib below extending to the car- 

 tilages in the two lower spaces, but in tin upper two or three not quite so far. 



Action.— To raise the ribs so as to increase the capacity of the chest. 



Xki;\ e Supply . Inn rcostal n< rv< s. 



