Alimentary tract and Epithelial duct

Alimentary tract noun - Tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination.

Epithelial duct and alimentary tract are semantically related. In some cases you can use "Epithelial duct" instead a noun phrase "Alimentary tract".

Epithelial duct noun - A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance.

Alimentary tract and epithelial duct are semantically related. Sometimes you can replace phrase "Alimentary tract" with "Epithelial duct", this phrases are similar.