Anal columns (Columns of Morgagni or less commonly Morgagni's columns) are a number of vertical folds, produced by an infolding of the mucous membrane and some of the muscular tissue in the upper half of the lumen of the anal canal. They are named after Giovanni Battista Morgagni who also has several other eponyms named after himself.
Famous quotes containing the word columns:
“When I heard the learn’d astronomer,
When the proofs, the figures, were ranged in columns before me,”
—Walt Whitman (1819–1892)