Lactiferous Duct Cells (Milk Tube Cells)

Lining the milk tubes

Inside the breast are lots of tiny, branching tubes called ducts, like the branches of a tree. They all lead to the nipple.

Lactiferous duct cells line the inside of these tubes. Around them is a layer of squeezy cells that can tighten like tiny hands.

Everyone has some of these ducts. They grow more when someone grows up.

Carrying milk to a baby

After a baby is born, milk is made in tiny sacs at the ends of the tubes. The tubes carry it to the baby.

• The duct cells make a smooth, tight lining so the milk can flow.
• The squeezy cells around them push the milk along.

Milk duct cell quiz