Rabbit Alimentary System

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BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY
BACK TO HINDGUT FERMENTERS - ANATOMY & PHYSIOLOGY

Introduction

Rabbits are monogastric hindgut fermenters that eat a herbivorous diet.

Stomach==

  • Simple and large

==Small Intestine

  • Functions similar to other animals but there are anatomical differences.
  • The caudal flexure of the duodenum is long and coiled, and may be referred to as the transverse part of the duodenum.
  • The sacculus rotundus exists at the ileocaecal junction. It is an enlargement of the large intestine and contains lymphoid tissue.

==Large Intestine

Caecum

  • Large, about twice the length of the abdominal cavity. Folded into four parts that flex upon each other.
  • Thin-walled.
  • Visible on the external surface is a spiral constriction that runs 20-30 times around the caecum. This is related to the folding of the mucosa internally.
  • There is an appendix at it's distal end containing lymphoid tissue.

Colon

  • Has ascending, transverse and descending parts.
  • The ascending colon is very long and occupies most of the ventral abdomen.
  • First part has taenia and haustra, the second part does not and is arranged into coils that lie in the dorsal part of the abdominal cavity.
  • The transverse and descending colons have the same anatomical arrangement as in other species.

Coprophagia

  • Rabbits eat some of their faecal pellets, often produced in the early morning.
  • Pellets that are eaten differ to normal pellets as they are softer, covered in mucus and smaller.
  • The purpose of this may be to gain access to the vitamins produced by bacteria in the caecum.