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The largest organ in the lymphatic system is the spleen. It is similar to a large lymph node and acts as a blood filter for the body. The spleen is an integral part of the immune system. Not only does it synthesize antibodies, but it also acts as a reservoir for many materials. There exists a method to remember the spleen’s measurements and location. This is the 1x3x5x7x9x11 rule. The approximate measurements of a spleen are one inch wide, three inches tall, and five inches long. It weighs roughly seven ounces and sits between the ninth and eleventh ribs.

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1. Structure and Location

The spleen lies underneath the left portion of the thoracic diaphragm. The side of the spleen facing the diaphragm is smooth, while the opposite side has a ridge that divides it into two parts: the anterior gastric portion and the posterior renal portion. A thin outer coating called a capsule protects the organ. Additionally, the spleen contains two regions of tissue -- white pulp and red pulp. The spleen is not part of the digestive system, despite connecting to the blood vessels of the stomach and pancreas.

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.