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The alimentary canal comprises the anatomic structures through which ingested food passes during digestion and absorption, ending with the excretion of food waste via the anus.
The anatomic structures of the alimentary canal are listed as follows, in order as they exist between the mouth and the anus. The adult human alimentary canal is approximately 20 feet long.
Mouth (oral cavity)
Small intestine (jejunum)
Small intestine (ileum)
A broader term used in medicine for the canal and associated digestive organs is the human gastrointestinal (GI) system. The system includes accessory digestive organs that secrete materials into various segments of the system to aid in the digestive process.
In the oral cavity the salivary and accessory salivary glands add saliva to the ingested food.
In the duodenum the gall bladder and pancreas add their secretions to facilitate digestion and absorption of food.
The reference defines the human GI tract and gives detailed information on embryology, anatomy, histology (microscopic anatomy), transit time and pathology (disease).
nostril - nassal passage - pharynx - oesophagous - stomach - duodenum - jejunum - ileum - caecum - colon - rectum - anus
The glands included are:
slaivary gland(parotid,sublingual & submandibular) - liver - pancreas
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