The correct route for a piece of bread eaten by a mammal is
oral cavity - oesophagus - stomach - ileum - rectum
oral - cavity - stomach - oesophagus - duodenum - ileum - rectum
oral cavity - oesophagus - duodenum - rectum
oral cavity - oesophagus - ileum - stomach - duodenum - rectum
oral cavity - oesophagus - stomach - ileum - duodenum - rectum
Correct answer is A
No explanation has been provided for this answer.