What is the Difference Between Spleen and Kidney?

The spleen and kidneys are two important organs in the human body, but they have different functions and characteristics. Some key differences between the spleen and kidneys include:

1. Shape: The spleen is a wedge-shaped organ, while kidneys are bean-shaped organs.
2. Location: The spleen is located inferior to the diaphragm, and it is considered the largest lymphoid mass. In contrast, kidneys are located near the spinal cord and are part of the urinary system.
3. Composition: The spleen is mainly composed of lymphatic cells and plays a central role in the immune system. Kidneys, on the other hand, are made up of nephrons, which are multicellular in structure and serve as the primary filter for the blood.
4. Function: The main functions of the spleen include the production of lymphocytes, destruction of erythrocytes, and hemopoiesis. The kidneys' main functions are filtration, reabsorption, and secretion of waste products.
5. Mobility and Ballotability: The spleen is mobile with respiration, whereas the kidney is not. The kidney is "ballotable," meaning it can be manually palpated and moved, while the spleen is not.
6. Organ Pairing: Kidneys are a pair of organs, while the spleen is a single organ.

Comparative Table: Spleen vs Kidney

Here is a table highlighting the differences between the spleen and kidney:

Please note that the measurements in the table are approximate and may vary slightly between individuals. The spleen is responsible for supporting the immune system and filtering blood, while the kidneys are responsible for filtering blood, producing urine, and regulating blood pressure, blood volume, and electrolyte balance.