Silkworm. Coloured scanning electron micrograph (SEM) of the head of a silkworm moth caterpillar (Bombyx mori). The silkworm uses its chewing mouthparts (upper centre) to feed on mulberry leaves. On either side of the mouthparts is an antenna and several simple eyes (ocelli, black round structures, upper left and right). The caterpillar has three pairs of jointed legs behind the head (lower centre). Most caterpillars also have prolegs further along the body (not seen). The silkworm produces threads of silk with which it constructs a cocoon. People farm silkworms for their silk, which is woven into cloth. Magnification: x25 when printed 10cm wide.