secretory antibodies

Secretory antibodies, primarily secretory IgA, are specialized antibodies produced by immune cells to protect mucous membranes such as those in the mouth, nose, respiratory, and digestive tracts. They are secreted into mucus, saliva, tears, and other body fluids, forming a first line of defense by neutralizing harmful germs and preventing their attachment to our body's surfaces. These antibodies play a crucial role in immune defense by intercepting pathogens before they can cause infections, helping to keep the body safe from illness at the points where the external environment meets internal tissues.