The spleen is the largest lymphatic organ located in the left hypochondriac region under the diaphragm and behind the stomach. It is approximately 12 cm long, 6 cm wide and 3 cm thick, weighing around 160 grams. The spleen has borders including a superior, inferior, posterior and anterior end. It has surfaces such as the diaphragmatic surface and visceral surface. Ligaments like the gastrosplenic and splenorenal connect the spleen and allow its movement. The spleen receives blood from the splenic artery and destroys old red blood cells while storing blood.

1. Anatomy practical
(Anatomy of Immune system - Spleen)
By : Osama Al-Zahrani
@OSAMA_Z96

2. - The Spleen is the largest lymphoid organ.
- Located in the left hypochondriac region, Under the copula of Diaphragm, and Behind the Stomach,
and above the left Kidney and tail of Pancreas .
- Hematopoietic organ before the birth (Fetus life period), after birth turn to lymphatic organ
- Sizes : 12 cm in length, and 6 cm in width, 3 cm in thickness. And finely 160 grams.
- Intraperitoneal organ.
Anatomy of Spleen (Anatomical Characteristics)

3. Lateral or Anterior End
Upper or Superior border
Medial or Posterior End
Lower or Inferior border
Lower or Inferior border
Gastrosplenic ligament
Gastric surface
Visceral surface
Splenoreno or
Lienorenal ligament
Visceral surface
colic surface
Diaphragmatic surface
Notches
Anatomy of Spleen (Border & Surface)

4. Anatomy of Spleen (Border & Surface)

5. • Borders :
1- Superior border.
2- Inferior border.
3- Posterior End.
4- Anterior End.
• Surfaces :
1- Diaphragmatic surface.
2- Visceral surface.
• Ligament :
1- Gastrosplenic ligament :
ligament between the Spleen and the Stomach allow the movement (contraction and relaxation) of Spleen.
2- Splenoreno or Lienorenal ligament :
ligament between the Spleen and the left Kidney allow the movement (contraction and relaxation) of Spleen.
Anatomy of Spleen (Border & Surface)

6. Anatomy of Spleen
• Structure in the hilum :
1- Splenic vessels.
2- Tail of the pancreas.
• Blood supply of Spleen :
Splenic artery.
• Function of Spleen :
Destruction of old RBCs & storage of the blood.
• Relation of Spleen :
1- Anterior : Stomach.
2- Posterior : Diaphragm & Left lung & Ribs 9-11
3- Inferior : Left colic flexure (splenic flexure).
4- Medial : Left kidney & Tail of the pancreas.