| Name: | testis |
|---|---|
| Synonyms: | testes |
| Definition: | Male reproductive organ. Adult zebrafish testes are paired organs forming elongated structures, internally organized into tubules. These tubules are formed by seminiferous epithelium containing cysts of spermatogonia and spermatocytes surrounded by somatic support cells, called Sertoli cells. Cysts are arranged around a lumen containing spermatozoa that is connected to the efferent ducts. The interstitial regions between the tubules contain the steroid-producing Leydig cells, connective tissue, and blood vessels. |
| Ontology: | Anatomy Ontology [ZFA:0000598] |
| Name: | has extra parts of type |
|---|---|
| Synonyms: | has extra parts of, has increased number of, having extra physical parts, having supernumerary physical parts, increased number of |
| Definition: | The bearer of this quality has_part > n of the indicated entity type, where n is the normal amount for a comparable organism. Note that the bearer of the quality is the whole, not the part. |
| Ontology: | Phenotypic Quality Ontology [PATO:0002002] |
| Name: | spermatocyte |
|---|---|
| Synonyms: | spermatocytes |
| Definition: | A male germ cell that develops from spermatogonia. The euploid primary spermatocytes undergo meiosis and give rise to the haploid secondary spermatocytes which in turn give rise to spermatids. |
| Ontology: | Anatomy Ontology [ZFA:0009005] |