HB-086 · Lymphatic & Immune · Part
Spleen
Also called: spleen Splen
3D anatomy data Classes 6-8 · Classes 9-10 · Classes 11-12 Intermediate Draft - educator review
3D is not available on this device, so a picture of the model is shown instead.
Parts: capsule; red pulp; white pulp; splenic vessels
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About
The spleen filters blood, removes old red blood cells and helps fight infection.
- 📍 Where it is
- Upper left abdomen, behind the stomach, under the ribs 9-11.
- 🧱 Structure
- Soft organ with red pulp (filters blood) and white pulp (immune tissue).
- ⚙️ What it does
- Removes old blood cells, stores platelets and makes immune responses to blood-borne germs.
💡 Key facts
- It is about the size of a fist.
- People can live without a spleen but need extra protection from some infections.
- It is easily injured in accidents.
✗ The spleen makes red blood cells in adults
✓ Adults make red cells in bone marrow; the spleen removes old ones.
📒 Words to know
- red pulp
- blood-filtering tissue
- white pulp
- immune tissue
- splenectomy
- removal of the spleen
🏫 Related lessons
- Cells and microorganisms Classes 6-8
- Health education Classes 9-10
Generic GayaGnan topic lessons. Check your own board's syllabus for the exact chapter.
🔎 Sources and credits
Catalog description: External and internal spleen anatomy.
- OpenStax Anatomy and Physiology 2e, ch. 21 (lymphatic and immune system) (accessed 2026-10-30)
- 3D models: BodyParts3D (DBCLS) and the Human Reference Atlas (HuBMAP), CC BY 4.0, with GayaGnan schematics. 3D model credits
For learning only. This site does not give medical advice, diagnosis or treatment, and it does not collect any health data.