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Female Pelvis & Breast

Uterine cervix

The firm, narrow lower part of the uterus that projects into the vault of the vagina. Its canal runs between the internal os above and the external os below.

How to spot it. The narrow, firm lower part of the uterus projecting into the top of the vagina.

What it does. Its canal and mucus control what passes between the vagina and the uterine cavity, and it dilates in labour.

Where it sits. Joined above to the body of the uterus at the internal os and opening below into the vagina at the external os.

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NEET points

Class 12 · Unit VI · Reproduction · Human Reproduction

  • The narrow lower part of the uterus, opening into the vagina through the external os.
  • The cervical canal together with the vagina forms the birth canal.

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.