Central nervous system | Lymph reticular tissues | Respiratory tract | Gastro-intestinal tract | Muscles | Miscellaneous |
---|---|---|---|---|---|
Encephalon | Tonsil | Trachea | Salivary glands | Tongue | Eye |
Cerebellum | Retropharyngeal lymph node | Lung | Esophagus | Masseter muscle | Kidney |
Brainstem | Mandibular lymph node | Olfactory tract at nasal septum, ethmoturbinates and ventral nasal concha | Liver | Biceps brachii muscle | Urinary bladder |
Cervical spinal cord | Mesenteric lymph node | Â | Rumen | Triceps femoris muscle | Mammary gland |
Thoracic spinal cord | Spleen | Â | Omasum | Heart | Adrenal gland |
Lumbar spinal cord | Third eyelid lymphoid tissue | Â | Reticulum | Â | Â |
 |  |  | Abomasum |  |  |
 |  |  | Duodenum |  |  |
 |  |  | Jejunum |  |  |
 |  |  | Ileum |  |  |
 |  |  | Ileo-ciecal valve |  |  |
 |  |  | Caecum |  |  |
 |  |  | Rectum |  |  |