The chemical barrier of the body that is deigned to help prevent infection is saliva.
Saliva is a fluid made up of salivary glands in your mouth. It is mostly consists of water but also contains white blood cells, epithelial cells, electrolytes and enzymes.
Saliva promotes the blood clotting process because it contains tissue factor. The enzyme lysozyme is present in different tissues and its purpose is to attack the cell walls of many bacteria, that helps against infection
Other than Saliva, Tears also contains lysozyme enzyme, so they can also aid in healing the wounds. However, doctors do not recommend these procedures because of various reasons.
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