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| ID: | XAO:0000055 |
| Full Id: | XAO:0000055 |
| Definitions: | A longitudinal flexible rod of cells that in the embryo forms the supporting axis of the body. It degenerates, beginning anteriorly, at NF stage 46. Its posterior portion is greatly reduced by NF stage 55 and the entire structure is gone by NF stage 65. |
| Ends During: | NF stage 66 |
| Develops From: | axial mesoderm |
| Subset: | frequent_anatomy_items |
| Xref: | ZFA:0000135 |
| Starts During: | NF stage 12.5 |
| Is A: | embryonic structure |
| Sub Class: | notochordal epithelium elastica externa notochordal sheath |