👉 Brook fluid, also known as Brooke's fluid, is a clear, viscous secretion produced by the Brooke glands located in the floor of the mouth, particularly around the base of the tongue and the tonsils. This fluid serves multiple purposes: it lubricates the oral cavity, aiding in speech and swallowing, and it helps protect the mucous membranes from mechanical damage and bacterial invasion. Additionally, Brook fluid contains antimicrobial agents that contribute to oral hygiene by inhibiting the growth of harmful bacteria. While it's not a major component of saliva, its presence is crucial for maintaining oral health and comfort.