Arterial segmentation in the spleen of the sheep (Ovis aries)

Forty corrosion casts of the splenic artery and its tree were used to study segmentation in the sheep spleen. Twenty eight spleens (70%) had two arterial segments, a right and a left. One spleen (2.5%) had a visceral and a parietal segment. Eleven spleens (27.5%) showed no arterial segmentation, the artery ramifying irregularly.