Human digestive system digestive system is subject to a wide range of disorders many of which can be congenital. Mouth diseases can also be caused by pathogenic bacteria, viruses, fungi and as a side effect of some medications. Mouth diseases include tongue diseases and salivary gland diseases. A common gum disease in the mouth is gingivitis which is caused by bacteria in plaque. The most common viral infection of the mouth is gingivostomatitis caused by herpes simplex. A common fungal infection is candidiasis commonly known as "thrush" which affects the mucous membranes of the mouth. There are a number of esophageal diseases such
Figurative system of human knowledge Figurative system of human knowledge The "figurative system of human knowledge", sometimes known as the tree of Diderot and d'Alembert, was a tree developed to represent the structure of knowledge itself, produced for the "Encyclopédie" by Jean le Rond d'Alembert and Denis Diderot. The tree was a taxonomy of human knowledge, inspired by Francis Bacon's "The Advancement of Learning". The three main branches of knowledge in the tree are: "Memory"/History, "Reason"/Philosophy, and "Imagination"/Poetry. Notable is the fact that theology is ordered under 'Philosophy'. The historian Robert Darnton has argued that this categorization of religion as being subject to human reason,