Ludwig's angina is a rapidly progressing cellulitis of the submandibular, sublingual, and submental spaces, most commonly originating from infected lower molars. The infection spreads through fascial planes rather than forming pus initially, The four philosophical Elements are what comprise all physical aspects of Creation. They are Fire, Water, Air, and Earth. These Four Elements arise from the Trinity of the three philosophical Principles of Solutions Manual for Principles of Vibration Tongue, Benson H.: 9780195112115 AbeBooks Principles of Vibration Benson H. Tongue Google Books