Iris
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Transverse section of the iris of a pigeon (HE): detail of the stroma (1)
Detail of the sphincter and dilatator muscle. In birds, the sphincter muscle is remarkably well developed. The dilatator muscle is a thin muscle.
Histology of Birds |
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Transverse section of the iris of a pigeon (HE): detail of the stroma (1)
Detail of the sphincter and dilatator muscle. In birds, the sphincter muscle is remarkably well developed. The dilatator muscle is a thin muscle.