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Female Pelvis & Breast

Main lactiferous duct

The duct draining one mammary lobe toward the nipple, widening into a lactiferous sinus before it opens on the nipple surface.

How to spot it. The duct leading from one mammary lobe toward the nipple.

What it does. Carries milk from the lobe to the nipple surface.

Where it sits. Widens into a lactiferous sinus before opening at the nipple.

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NEET points

Class 12 · Unit VI · Reproduction · Human Reproduction

  • The last link in the chain: mammary ampulla → lactiferous duct → the nipple surface.
  • Milk ejection is driven by oxytocin from the posterior pituitary; prolactin from the anterior pituitary drives its production.

Chapter numbering moved when NCERT rationalised its books in 2023 and the NTA has revised the NEET syllabus since, so this maps by unit and title. It is a study aid, not a syllabus.

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Built on the open-source Human Atlas by Ashe Magalhaes. Anatomy from BodyParts3D (© The Database Center for Life Science, CC BY 4.0) and the HuBMAP Human Reference Atlas (CC BY 4.0). Those datasets keep their own licences and attribution; the application code is MIT.