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Lymph

(Science: physiology) The almost colourless fluid that bathes body tissues and is found in the lymphatic vessels that drain the tissues of the fluid that filters across the blood vessel walls from blood. Lymph carries lymphocytes that have entered the lymph nodes from the blood.

 lymphocytes aid in destroying antigens in which they engulf or they take the antigen to the thrid line of defence ( B and t cells, which are specific).