Abstract
Udder lymph resembles the lymph draining most other organs in its content of lipid, protein and glycoprotein. The composition of the lymph is apparently more variable than that of the plasma. Protein and lipid occur in lower concentrations in lymph than in plasma. The concentration of phospholipid in udder lymph is, however, very low and is significantly reduced when compared with the other lipid or the glycoprotein constituents. It is possible that this is connected with milk synthesis.