noun, Pathology. 1. the accumulation of excessive ketones in the body, as in diabetic acidosis. Origin of ketosis. 1915-1920.
Climate zones of Africa, showing the ecological break between the hot desert climate of the Sahara Desert (red), the hot semi-arid climate of the Sahel (orange) and the tropical climate of Central and Western Africa (blue).
Physical Environment: The physical environment of North Africa as once stated before is very diverse. Western Sahara is on the coast of the Atlantic Ocean. This area is made up of humid desert flatlands. Morocco, Tunisia and Algeria, which are the Maghreb countries, have the Atlas Mountains running through them.