| LC control no. | sh 85002697 |
|---|---|
| Topical heading | Air sacs (Bird anatomy) |
| Variant(s) | Air-sacs (of birds) Sacs, Air (Bird anatomy) |
| See also | Birds--Respiratory organs |
| Found in | Random House (air sac: any of certain cavities in a bird's body connected with the lungs) |
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