Define the following terms:
$(i)$ Haemocytes
$(ii)$ Copulatory pad

(N/A) $(i)$ Haemocytes are the blood cells found in the haemolymph of a cockroach. They are involved in phagocytosis and the transport of nutrients.
$(ii)$ $A$ copulatory pad (or nuptial pad) is a specialized structure that develops on the first digit of the forelimbs of male frogs during the breeding season to help them grasp the female during amplexus.