| Name: | pronephric tubule | 
|---|---|
| Synonyms: | ciliated neck segment | 
| Definition: | Bilaterally paired tubes connecting the pronephric glomeruli to the pronephric ducts. In zebrafish and other teleosts, the pronephric nephron and tubules form after the pronephric duct, connecting to the anterior-most tip of the pronephric ducts. | 
| Ontology: | Anatomy Ontology [ZFA:0001558] | 
| Name: | apical part of cell | 
|---|---|
| Synonyms: | apical region of cell | 
| Definition: | The region of a polarized cell that forms a tip or is distal to a base. For example, in a polarized epithelial cell, the apical region has an exposed surface and lies opposite to the basal lamina that separates the epithelium from other tissue. | 
| Ontology: | GO: Cellular Component [GO:0045177] QuickGO AmiGO |