. Anatomy of the cat. Cats; Mammals. THE ARTERIES. 301 also sends branches onto the dorsum of the hand at the sides of the fourth metacarpal. Branches pass from these proximad to the wrist. ]?). Aorta audominafjs. TiiI': Aijdominal Aorta. The abdominal aorta emerges into the abdomen from between the crura of the diaphragm, at about the level of the second lumbar vertebra. It passes caudad along the dorsal middle line, lying to the left of the inferior vena '' cava. It gives off parietal branches to the body wall, and visceral branches to the viscera, and ventrad of the first sacral vertebra it
. Anatomy of the cat. Cats; Mammals. THE ARTERIES. 301 also sends branches onto the dorsum of the hand at the sides of the fourth metacarpal. Branches pass from these proximad to the wrist. ]?). Aorta audominafjs. TiiI': Aijdominal Aorta. The abdominal aorta emerges into the abdomen from between the crura of the diaphragm, at about the level of the second lumbar vertebra. It passes caudad along the dorsal middle line, lying to the left of the inferior vena '' cava. It gives off parietal branches to the body wall, and visceral branches to the viscera, and ventrad of the first sacral vertebra it gives off two large branches on each side, the external iliac (Fig. 126, k) and the hypogastric (Fig. 126, /)—a very small median vessel, the sacralis media (Fig. 126, o), continuing the course of the t„e PA^fAR Arch aorta and passing into the tail. The aorta gives off the following. AND ITS Branches in the Palm of the Hand. The interosseous mus- branches: A. coeliaca; A. mesenterica cies have been removed, adrenolu nales; A. mesenterica inferior; Aa. ilio- superior; Aa. adrenolumbales; Aa. re- r.^.^'^Crdil'" ''^' I, M. abductor digiti quinti; 2, ,,, *ii_i-/ • \ i- Mm. interf)ssei of third lumbales; Aa. lumbales (seven pairs); and fourth digits; 4, m. Aa. iliacee externae ; Aa. hypogastricae. adductor poiiicis; 5, m. flexor brevis polhcis. a, A. A. coeliaca (Fig. 125). Thecoeliac termination of radial artery; artery is a large branch which is given off ^'' ^^=^,''.^'?^11; f-^;"- •' ° ° ceps poliicis et indicis; a, from the aorta one centimeter or less Aa. interossere; r, muscu- 1 1 r ,1 • „ • i-i ]• 1 lar branches of tlie same; caudad of the openmg m the diaphragm. ^^ A.^inaris; g, deep pall It passes directly ventrad about three or mar branch of ulnarnerve. four centimeters, then divides, usually at once, into three branches. The most cranial of these is the hepatic [d), the next is the gastrica sinistra {e), while the third and largest, se
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