Check your grammar now! : a complex sphincter closing the duodenal orifice of the common bile duct.
This Living Encyclopedia of East Africa is intended to provide information on the countries that primarily make up Swahili-speaking region of East Africa in a concise form. These countries are Kenya, Tanzania, Uganda, Rwanda, and Burundi.
In terms of language, East Africa is united by the common lingua franca known as Swahili. This language is both the native tongue of a specific people - the Swahili - and a lingua franca spoken by more than 50 million people throughout the region.