The average length of the small intestine in rabbit is 270 cm, duodenum is 48 cm, jejunum is 190.6 cm and ileum is 31.5 cm. The length of the large intestine is 194.9 cm, caecum with appendix is 62.6 cm, large colon is 26.3 cm, small colon is 80.1 cm and rectum is 25.9 cm. The length of the gastrointestinal tract is 465 cm. The total thickness of the wall of the gastrointestinal tract ranges from 1329 micrometers (rectum) to 3054 micrometers (gastric fundus), thickest than the mucosal layer, which is in the range is 374-2146 micrometers, followed by muscle is 47-1324 micrometers and submucosal layer is 28-357 micrometers. Thus, it is possible to conclude that at a histologic structure of a gastrointestinal tract of hare hare has differ structures, especially in the blind gut, where the mucosa has a large folds structure with various distances among them, from 50 to 3000 microns.