thumb|right|Tracheal system of the mite Stigmaeus humilis (C. L. Koch). [[Anthonie Cornelis Oudemans, 1913.]] Tracheole (trā'kē-ōl') is a fine respiratory tube of the trachea of an insect or a spider, part of the respiratory system.
thumb|right|Tracheal system of the mite Stigmaeus humilis (C. L. Koch). [[Anthonie Cornelis Oudemans, 1913.]] Tracheole (trā'kē-ōl') is a fine respiratory tube of the trachea of an insect or a spider, part of the respiratory system.
Tracheoles are about 1 μm in diameter, and they convey oxygen to cells while providing a means for carbon dioxide to escape.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).