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Abdomen

Spleen

How to spot it. A soft, fist-sized organ high in the left upper abdomen, behind the stomach.

What it does. Filters blood, removes worn red cells, and mounts immune responses to blood-borne organisms.

Where it sits. Sits against the diaphragm and the left kidney, behind the stomach.

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NEET points

Class 11 · Unit V · Human Physiology · Body Fluids and Circulation

  • The largest lymphoid organ, packed with lymphocytes and phagocytes.
  • It filters blood and destroys worn-out red cells, which is why it is called the graveyard of erythrocytes, and it also acts as a reservoir of them.

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.