| Name: | heart tube |
|---|---|
| Synonyms: | |
| Definition: | Cavitated compound organ that will become the adult heart following looping morphogenesis and valve formation. |
| Ontology: | Anatomy Ontology [ZFA:0000360] |
| 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 |