While the presence of Islam in West Africa dates back to eighth century, the spread of the faith in regions that are now the modern states of Senegal, Gambia, Guinea, Burkina Faso, Niger, Mali and Nigeria, was in actuality, a gradual and complex process.
Hypoventilation is a condition that arises when air entering the alveoli, small air sacs in the lungs that are the site of respiratory gas exchange, is reduced. This causes levels of oxygen to decrease and the levels of carbon dioxide to increase.
Cremation is the process of reducing human remains to its basic elements in the form of bone fragments through flame, heat and vaporization (usually 1800 - 2000 degrees Fahrenheit for two hours or more.) Cremation occurs at a crematory in a special kind of furnace called a cremation chamber or retort.