| Name: | blastomere |
|---|---|
| Synonyms: | blastomeres |
| Definition: | Cell that arises during cleavage and is partially cleaved, and located at the blastodisc margin prior to collectively forming the yolk syncytial layer (YSL) in the midblastula. |
| Ontology: | Anatomy Ontology [ZFA:0000093] |
| Name: | endoplasmic reticulum |
|---|---|
| Synonyms: | ER |
| Definition: | The irregular network of unit membranes, visible only by electron microscopy, that occurs in the cytoplasm of many eukaryotic cells. The membranes form a complex meshwork of tubular channels, which are often expanded into slitlike cavities called cisternae. The ER takes two forms, rough (or granular), with ribosomes adhering to the outer surface, and smooth (with no ribosomes attached). |
| Ontology: | GO: Cellular Component [GO:0005783] QuickGO AmiGO |