| columnae anales | A number of vertical ridges in the mucous membrane of the upper half of the anal canal formed as the caliber of the canal is sharply reduced from that of the rectal ampulla. Synonym: columnae anales, Morgagni's columns, rectal columns. (05 Mar 2000) |
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| valvulae anales | Delicate crescent-shaped mucosal folds that pass between the lower ends of neighboring anal columns; the small pocket thus formed is an anal sinus. Synonym: valvulae anales, Morgagni's valves. (05 Mar 2000) |
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| sinus anales | The grooves between the anal columns. Synonym: Morgagni's sinus. Pockets or crypts in the columnar zone of the anal canal between the anocutaneous line and the anorectal line; the sinuses give the mucosa a scalloped appearance. Synonym: sinus anales, anal crypts, Morgagni's crypts, rectal sinuses. (05 Mar 2000) |
| venae columnae vertebralis | Includes the internal and external vertebral venous plexuses, the basivertebral veins, and the anterior and posterior spinal veins. Synonym: venae columnae vertebralis. (05 Mar 2000) |
| cervix columnae posterioris | A slight constriction of the posterior gray column of the spinal cord, seen on cross-section just behind the gray commissure. (05 Mar 2000) |
| columnae carneae | Muscular bundles on the lining walls of the ventricles of the heart. Synonym: columnae carneae, Rathke's bundles. (05 Mar 2000) |
| columnae griseae | The three somewhat ridge-shaped masses of gray matter (anterior, posterior, and lateral columns) that extend longitudinally through the centre of each lateral half of the spinal cord; in transverse sections these columns appear as gray horns and are therefore commonly called ventral or anterior, dorsal or posterior, and lateral horn, respectively. Synonym: columnae griseae. (05 Mar 2000) |
| columnae renales | The prolongations of cortical substance separating the pyramids of the kidney. Synonym: columnae renales, Bertin's columns. (05 Mar 2000) |
| columnae rugarum | Two slight longitudinal ridges, anterior and posterior, in the vaginal mucous membrane, each marked by a number of transverse mucosal folds. Synonym: columnae rugarum, vaginal columns. (05 Mar 2000) |
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