Is the spleen part of the gastrointestinal?

No, the spleen is not part of the gastrointestinal (GI) tract. It is an organ of the lymphatic system and is primarily involved in filtering blood, recycling iron from red blood cells, and supporting the immune system. While it is located in the abdominal cavity near the stomach, its functions are distinct from those of the GI system, which is responsible for digestion and nutrient absorption.