Which organ is part of the lymphatic system?

The spleen is part of the lymphatic system, which plays a crucial role in immune function and fluid balance within the body. Located in the upper left quadrant of the abdomen, the spleen filters blood, removing old or damaged red blood cells and recycling iron. It also serves as a reservoir for lymphocytes, which are vital components of the immune system, helping to fight infections. Additionally, the spleen produces antibodies and is involved in the responses to blood-borne pathogens.

In contrast, the lungs primarily function within the respiratory system, facilitating gas exchange and oxygenation of blood. The kidneys are part of the urinary system, responsible for filtering waste from the blood and regulating fluid and electrolyte balance. The pancreas, while involved in the digestive system and endocrine function, does not have a role within the lymphatic system. Each of these other organs has distinct functions that do not overlap with the roles of the lymphatic system, highlighting the unique position of the spleen in immune defense and blood filtration.