1 Anatomy Terms
| Definition | Name | Synonym | Primary Identifier |
|---|---|---|---|
| a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents. | anal depressor muscle | dilator muscle | WBbt:0004292 |
