- Anatomy, physiology, systematics
- Bacterial infections
- Circulatory system
- Digestive tract
- Endocrine organs
- Eye
- Fungal infections
- Genital apparatus
- Liver
- Metabolic diseases
- Neoplasia
- Nervous system
- Parasitic infections
- Protozoan infections
- Respiratory system
- Skeleton & muscles
- Skin and appendages
- Spleen
- Urinary system
- Viral infections