title: The ultrastructure of epithelioid cells in the avian (Gallus domesticus) carotid body.
abstract: 10 clinically healthy white leghorn males were utilised for this investigation. Apart from toluidine blue-pyronin-stained Araldite sections, uranyl acetate and lead monoxide staining revealed three types of epithelioid cells. Nuclear and cytoplasmic contents, especially three types of granules, conveniently designated as q, r and p granules, are described in detail and tabulated. Technical difficulties in obtaining carotid body tissue as well as clear-stained sections for ultastructural studies are mentioned.
mesh_terms: D000818:Animals; D002344:Carotid Body / Q000648:ultrastructure*; D002467:Cell Nucleus / Q000648:ultrastructure; D002645:Chickens / Q000033:anatomy & histology*; D003593:Cytoplasm / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D004848:Epithelium / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D009940:Organoids / Q000648:ultrastructure