| Name: | yolk |
|---|---|
| Synonyms: | yolk cell |
| Definition: | Giant syncytial uncleaved cell containing nutrient store for embryonic development in the form of semicrystalline phospholipoprotein and contained within yolk granules. |
| Ontology: | Anatomy Ontology [ZFA:0000084] |
| Name: | ionocyte |
|---|---|
| Synonyms: | |
| Definition: | Specialized epithelial cells involved in the maintenance of osmotic homeostasis. They are characterized by abundant mitochondria and ion transporters. In amniotes, they are present in the renal system. In freshwater fish, ionocytes in the skin and gills help maintain osmotic homeostasis by absorbing salt from the external environment. |
| Ontology: | Anatomy Ontology [ZFA:0005323] |