| 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: | meiosis I |
|---|---|
| Synonyms: | meiosis I nuclear division |
| Definition: | The first meiotic nuclear division in which homologous chromosomes are paired and segregated from each other, producing two haploid daughter nuclei. |
| Ontology: | GO: Biological Process [GO:0007127] QuickGO AmiGO |
| Name: | decreased process quality |
|---|---|
| Synonyms: | |
| Definition: | A quality of a process that has a value that is decreased compared to normal or average. |
| Ontology: | Phenotypic Quality Ontology [PATO:0002302] |