532 LABORATORY MANUAL OF HUMAN ANATOMY 



Superior Hemorrhoidal Artery (A. haemorrhoidalis superior). (Vide 



Fig. 286, and Spalteholz, Fig. 470.) 



Trace this artery down into the mesorectum. What course 

 does it pursue below, and how does it end in the rectal wall? 



FIG. 286. 



_V. haemorrhoidalis superior 



A. haemorrhoidalis superior 



A., haemorrhoidalis 

 media 



A. haemorrhoidalis inferior 



The arteries and veins of the rectum and anus. Their disposition upon the periphery of the posterior 

 wall. (From Poirier et Charpy, Trait6 d'Anat. hum., Paris, 1901, 2 ed., t. iv. p. 389, Fig. 200.) 



Middle Sacral Artery (A. sacralis media). 



(a) Lowest lumbar artery (A. lumbalis ima). 



(b) Coccygeal skein (glomus coccygeum). 



