| Name: | embryonic structure |
|---|---|
| Synonyms: | embryonic structures |
| Definition: | Anatomical structure that is part of the embryo and is comprised of portions of tissue or cells. |
| Ontology: | Anatomy Ontology [ZFA:0001105] |
| Name: | nucleus |
|---|---|
| Synonyms: | cell nucleus, horsetail nucleus |
| Definition: | A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent. |
| Ontology: | GO: Cellular Component [GO:0005634] QuickGO AmiGO |