What is the name of the duct located inside the breast lobule?

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Inside a breast lobule, the small duct that collects secretions from the acini is called the intralobular duct, also known as a terminal or subsegmental duct. This duct sits within the lobule and drains toward the larger ducts outside the lobule. The larger lactiferous ducts run toward the nipple, and the term terminal ductal lobular unit describes the functional pairing of a terminal duct with its associated lobule, not the single duct inside the lobule. So the duct within the lobule is the intralobular duct.