| Name: | pericardium | 
|---|---|
| Synonyms: | pericardial sac | 
| Definition: | Serous membrane that surrounds the heart. | 
| Ontology: | Anatomy Ontology [ZFA:0000054] | 
| Name: | nucleate erythrocyte | 
|---|---|
| Synonyms: | RBC, red blood cell | 
| Definition: | An erythrocyte having a nucleus. | 
| Ontology: | Anatomy Ontology [ZFA:0009256] |