(i) Haemolymph acts as a water reservoir. It contains 92% water.
(ii) It transports nutrients, minerals, hormonal secretions.
(iii) Maintains water balance in the body.
(iv) Wings help in circulation and shedding of shells.
(v) Hemocytes ingest microbes by the process of phagocytosis. As a result, disease is prevented.
(vi) Haemocytes help in blood clotting and wound healing.
(vii) Haemocytes secrete mucopolysaccharides to form connective tissue.