terminal saccules

terminal saccules

the thin-walled dilations (primordial alveoli) that develop at the ends of the respiratory bronchioles and develop a close relationship with the capillaries.
Synonym(s): terminal sacs

ter·mi·nal sac·cules

(tĕr'mi-năl sak'yūlz)
The thin-walled dilations (primordial alveoli) that develop at the ends of the respiratory bronchioles and develop a close relationship with the capillaries.
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