Body fluids are a type of liquid that is found in the human body. LYMPH is a clear, slightly yellowish fluid that circulates through the lymphatic system and helps fight infection. SAP is a sticky, sweet liquid produced by plants. BLOOD is a red-colored liquid that carries oxygen and nutrients throughout the body. SERUM is a clear, straw-colored liquid that separates from clotted BLOOD. SALIVA is a clear, watery liquid produced by the salivary glands in the mouth. SPIT is another word for SALIVA. ICHOR is a thin, watery fluid that was believed to flow in the veins of the gods in Greek mythology.