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
Gibbon–human last common ancestor Gibbon–human last common ancestor The gibbon–human last common ancestor (GHLCA, GLCA, or G/H LCA) is the last species that the families Hominidae and Hylobatidae (i.e. the orangutan–gorilla–chimpanzee–human last common ancestor on one hand and gibbons on the other) share as a common ancestor. It is estimated to have lived (T) during the early Miocene. According to Mark Grabowski, lead author of a study reported in "Nature Communications", the species, which has not been identified, was smaller than previously thought. The study reports that the last common ancestor of humans and all living apes was about the size of a gibbon.