Ultrastructure of the supporting cells of the paratympanic organ in the chicken: a preliminary study.

Electron microscopic studies reveal that the supporting cells of the paratympanic organ in the chicken have a fine structure characterised by mitochondria, RER and a well developed Golgi apparatus; furthermore, several vesicles with a clear content can be observed in the apical cytoplasm. The ultrastructure of supporting cells indicates high metabolic activity. The possible metabolic and mechanical function of the supporting cells are discussed.