| Name: | blastoderm |
|---|---|
| Synonyms: | |
| Definition: | Embryonic structure that is composed of the cellular part of the embryo, excluding the yolk cell, derived from the blastodisc by early morphogenesis; refers particularly to the time when the cell array is sheet-like, between 30%-epiboly and the end of gastrulation. |
| Ontology: | Anatomy Ontology [ZFA:0001176] |
| 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 |