ABDOMINAL TRANSECTION. 99 



The former may tlien be thrown away, and tlie latter preserved, or 

 dissected while fresh. The kidneys are important visceral land- 

 marks, and are easily preserved, hence they may be retained with 

 the cephalic part. 



Abdominal transection may be performed alone, but it is more 

 conveniently done when another person holds the cat in the desired 

 positions. The assistant, also, may read the directions to the 

 operator. 



§ 235. Instruments and Materials. — Arthrotome ; tracer ; 

 medium scalpel ; coarse curved scissors ; hair scissors ; block ; 

 twine, about half a meter ; skeleton ; wide mouthed jar (about 

 6x12, 15 or 18 in.) ; alcohol, 52-67 per cent., to half fill the jar; 

 coarse syringe ; large tray. 



§ 236. Parts Involved. — The following parts are more or less 

 directly involved in Abdominal Transection. From the figures and 

 sections referred to, enough should be learned to enable the operator 

 to recognize them during the operation : — 



Aorta.— ¥\^. 101. 



Columna Vertehralis. — The spinal column. 



Costce—R\b^.—F\g. 30, 50, 73. 



CosticartUagines — The costal cartilages. — Fig. 30, 50. 



Crista ilii — The crest of the ileum. — Fig. 30, 51. 



BiarpTiragma — The diaphragm. — Fig. 90, 101. 



Epigastrium~1\\Q "pit of the stomach."— Fig. 30, 72. 



Fibro-cartilago intervertehralis—ThQ (sixth lumbar) interverte- 

 bral disk of fibro-cartilage. — Fig. 51. 



Hepar — The liver. — Fig. 77. 



Intestinum Tenue — The small intestine. — Fig. 77. 



Ligamenturri Suspensorium Hepatls — The suspensory liga- 

 ment of the liver. 



Mesenterium. — Fig. 78. 



(Esophagus — The gullet. — Fig. 107. 



Parietes Ahdominales — The abdominal parietes, the muscular 

 and membranous lateral and ventral walls of the abdomen. — Fig. 

 77, 101. 



Pelvis— T\\Q pelvic girdle. — Fig. 30, 51. 



Posicava — Vena cava inferior s. ascendens. — Fig. 101 o 



Pectum.—F\g. 11. 



Menes—T\\Q kidneys.— Fig. 79, 101. 



Stomackus — The stomach. — Fig. 79, 81. 



