Answer:
The eyes in cockroach
are large, sessile, paired, bean-shaped and present on either sideof head.
These are compound in nature. Each compound eye consists of a large numberof
visual elements called ommatidia.
Each ommatidium is
composed of a diopteric region and reticular (receptor) region. It iscapable of
producing a separate image of a small part of 'object seen.
Thus, the
image of the object viewed consists of several pieces and hence known as mosaic
image. From the inner end of each ommatidium, fine nerve fibers arise, all of
which combine to form one optic nerve connected to the brain.
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