20 



DISSECTION OF THE DOG 



Intestinum aaicuM. — The caecum is a short spiral or bent tube, the free 

 blind end of which points towards the pelvis. There is considerable variation 



Costa 12 



m. longissimus dorsi 



\ 



m. Uio-costalis 



m. latissimus dorsi. 

 mm. mtercostales 



, Biaphrajma 

 Aorta 



Vena cava caudalis 



m. obliquus 

 abdominis externus 



m. rectus abdominis 



Fig. 5. — Transverse section of the abdomen on a level with the eleventh, thoracic vertebra. 

 7, 8, 9, 10, 11 = seventh, eighth, ninth, tenth, and eleventh ribs. 



in the length of this part of the intestine, and also in its form. It lies to the 

 right of the median plane in the umbilical region. 



Colon. — The colon is divided into three parts : (1) The ascending colon 

 (colon ascendens) leaves the ceecum and runs cranialwards to the right of the 

 median plane for a short distance and then turns to the left, thus forming the 



