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Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
The Serer people of Senegal, Gambia, and Mauritania are bilineal, but matrilineality (tiim, in Serer) is very important in their culture, and is well preserved. [ 2 ] [ 3 ] There are a multitude of Serer maternal clans with their various history and origins.
Vestigial features may take various forms; for example, they may be patterns of behavior, anatomical structures, or biochemical processes. Like most other physical features, however functional, vestigial features in a given species may successively appear, develop, and persist or disappear at various stages within the life cycle of the organism ...
The subjective experience of being unseen by others in a social environment is social invisibility. A sense of disconnectedness from the surrounding world is often experienced by invisible people. This disconnectedness can lead to absorbed coping and breakdowns, based on the asymmetrical relationship between someone made invisible and others. [5]
This is a non-exhaustive list of societies that have been described as examples of stateless societies. There is no universally accepted definition of what constitutes a state , [ 1 ] or to what extent a stateless group must be independent of the de jure or de facto control of states so as to be considered a society by itself.
In sociology and psychology, mass hysteria is a phenomenon that transmits collective illusions of threats, whether real or imaginary, through a population and society as a result of rumors and fear. [ 1 ] [ 2 ] In medicine, the term is used to describe the spontaneous manifestation—or production of chemicals in the body—of the same or ...
He also writes that they are more vestigial in the 'civilized' races as opposed to African race, which he attributes to diet. Richard001 23:42, 5 July 2007 (UTC) If wisdom teeth are more vestigial in societies whose diet has changed as a result of agriculture, then their vestigiality is largely dependent on the society in which the diet exists.
In social sciences, atavism is the tendency of reversion: for example, people in the modern era reverting to the ways of thinking and acting of a former time. The word atavism is derived from the Latin atavus —a great-great-great-grandfather or, more generally, an ancestor.