The correct sequence of food processing, in human being is Mouth $\rightarrow$ Buccal cavity $\rightarrow$ Pharynx $\rightarrow$ Oesophagus $\rightarrow$ Stomach $\rightarrow$ Duodenum $\rightarrow$ lleum $\rightarrow$ Caecum $\rightarrow$ Rectum $\rightarrow$ Elimination