Arrange the following organs of the human alimentary canal in the correct order of food passage.
A. Oesophagus
B. Stomach
C. Mouth
D. Intestine
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → C, A, B, D
The alimentary canal is one long tube from the mouth to the anus, and food passes through its parts in a fixed order:
C. Mouth — food is chewed and mixed with saliva, which begins the digestion of starch.
A. Oesophagus — the food pipe; waves of muscle movement (peristalsis) push the food down to the stomach.
B. Stomach — food is churned with gastric juice, which contains hydrochloric acid and begins the digestion of proteins.
D. Intestine — digestion is completed and the food is absorbed in the small intestine; the large intestine absorbs water from what is left.