586 



APPENDIX 



Remove the thymus and pericardium and turn the heart to 

 animal's right. Note : left auricle, left ventricle, parts of 

 right auricle and ventricle ; pulmonary artery ; arch of 

 aorta ; innominate, right subclavian, right common carotid, 

 left common carotid and left subclavian arteries ; dorsal aorta, 

 passing through diaphragm ; left superior vena cava, left sub- 

 clavian, external jugular, and pulmonary veins ; inferior vena 

 cava, oesophagus (Fig. 325, lower part). 



After doing No. 7, cut through great vessels at some distance from 

 the heart and remove the latter. Note in dorsal and ventral 

 views of it 1 the chambers and vessels mentioned above. 



Cut open the right side of the heart. Note thin wall of auricle, 



-puZ.a* 



•puZye 



Fig. 419. — A diagram of the heart of the rabbit, in ventral view. 



Lettering as in Figs. 325 and 420. 



Parts containing venous blood are shaded. 



8, 



thick wall of ventricle, columnar carneae, flaps of tricuspid 

 valve, chorda; tendinese and papillary muscles, semilunar 

 valves, openings of veins (Fig. 420). 



Remove the skin of neck and underlying muscles. Note and 

 trace : posterior cornu of hyoid ; tendon of mandibular muscle ; 

 larynx, trachea ; thyroid gland ; oesophagus ; common, 

 external, and internal carotid arteries ; external and internal 

 jugular, anterior and posterior facial veins ; submaxillary and 

 parotid glands ; main vagus, superior and recurrent laryn- 

 geal, depressor, hypoglossal, and cervical sympathetic nerves ; 

 vagus and superior cervical sympathetic ganglia (Fig. 325). 



Remove the brain. Note : in dorsal view, olfactory lobes, cerebral 



1 The heart of a sheep is often dissected instead of that of the rabbit. The chief 

 difference between the two is that, like those of man, the two superior venae cava 

 (innominate veins) of the sheep unite before entering the auricle. 



