In breast, the mammary alveoli open into the
Mammary tubule
Mammary duct
Mammary tubules of each mammary lobe join to form a common duct called mammary duct which opens into the ampulla.
Mammary tubule
Milk produced by the cells of alveoli and is stored in the lumen of alveoli. All alveoli of a mammary lobe open into a common tubule called mammary tubule.
Mammary ampulla
Mammary ampulla is formed by the joining of multiple mammary ducts. Ampulla releases milk into the lactiferous duct which has an opening in the nipples from where milk is released during the suckling of the baby.
Lactiferous duct
Lactiferous duct is present in the mammary glands. Ampulla releases milk in the lactiferous duct which has an opening in the nipples from where milk is released.
Arrangement of ducts
The sequence of arrangement of ducts in the mammary glands is as follows:
Alveoli → Mammary tubules → Mammary duct → Mammary ampulla → Lactiferous duct.