| Name: | atrium |
|---|---|
| Synonyms: | |
| Definition: | Cavitated compound organ that receives inflow of deoxygenated blood and delivers it to a muscular cardiac ventricle. Valves are present to direct flow. There are only two chambers present in the fish heart. |
| Ontology: | Anatomy Ontology [ZFA:0000471] |
| Name: | cardiac chamber ballooning |
|---|---|
| Synonyms: | |
| Definition: | The morphogenic growth in which the chambers of the heart expand in size, contributing to their shaping. |
| Ontology: | GO: Biological Process [GO:0003242] QuickGO AmiGO |