Describe the digestive system of the rabbit with a labelled diagram.

1. 1 · Open in one line. The rabbit, a herbivorous mammal, has a long alimentary canal and digestive glands suited to a plant diet.
2. 2 · Draw and label. [Oesophagus, stomach, duodenum, liver, gall bladder, pancreas, ileum, sacculus rotundus, caecum, vermiform appendix, colon, rectum, anus]
3. 3 · Alimentary canal.
   • Mouth, buccal cavity with teeth and tongue, pharynx, oesophagus.
   • Stomach; small intestine (duodenum and ileum).
   • Sacculus rotundus, caecum and vermiform appendix; colon, rectum and anus.
4. 4 · Digestive glands.
   • Four pairs of salivary glands.
   • Gastric glands, liver with gall bladder, pancreas and intestinal glands.
5. 5 · Dentition. Thecodont, diphyodont and heterodont; I 2/1, C 0/0, PM 3/2, M 3/3 = 28; diastema; ever-growing incisors.
6. 6 · Real life. Rabbits, like cows, need bacteria in the gut to digest the cellulose in grass.
7. 7 · Close in one line. A long gut, a large caecum and gnawing teeth make the rabbit a good plant-eater.

Scoring tip: Write the dental formula in fraction form and show the total. Label the caecum and appendix clearly.