Assertion: salivary gland's duct | /r/HasProperty | formed
Facets:
Source sentences:
text: As the epithelial layer folds in on itself and grows into the underlying mesoderm layer, the secretory cells and ducts are formed, which will eventually produce and secrete saliva.
text: In the formed lumen, narrow primary excretory ducts with low cuboidal epithelium are formed.