ABDOMINAL TRANSECTION. 99 



The former may then be thrown away, and the 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 iand Materials. — Arthrotome ; tracer ; 

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

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

 6 X 12, 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. Prom the figures and 

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

 to recognize them during the operation : — 

 • Aorta.— ¥\g. 101. 



Columna Yertebralis. — The spinal column. 



CostcB—EXbs.—¥ig. 30, 50, 73. 



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



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



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



Epigastrium— 1\\& "pit of the stomach.?'— Fig. 30, 72. 



Fibro-cartilago inter'oertebralis-'YhQ (sixth lumbar) interverte- 

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



Hepar—The liver.— Fig. 77. 



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



Ligamentum Suspensorium Hepatis — 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— The pelvic girdle.— Fig. 30, 51. 



Postcava—Yena cava inferior s. ascendens.— Fig. 101. 



Rectum.— ¥\g. 77. 



Renes—The kidneys.— Fig. 79, 101. 



Btomachus—The stomach.— Fig. 79, 81. 



