Outline+of+digestive+system

__ UNIT 3. NUTRITION: The Digestive and Respiratory Systems __ __ 1.- The digestive system __ __ 2.- Digestive processes __ __ 3.- Principal diseases of the digestive system __ __ 4.- Healthy habits for the digestive system __ __ 5.- The respiratory system __ __ 6.- How the respiratory system works __ __ 7.- Diseases of the respiratory system __ __ ______________________________________________ __