Arthropod eyes are called compound eyes
because they are made up of repeating
units, the ommatidia, each of which
functions as a separate visual receptor.
What is the difference between compound
eyes and simple eyes?
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Why is mosaic vision with less resolution
seen in cockroaches?
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Answers
Answer:
rthropod eyes are called compound eyes because they are made up of repeating units, the ommatidia, each of which functions as a separate visual receptor.
Each ommatidium consists of
a lens (the front surface of which makes up a single facet)
a transparent crystalline cone
light-sensitive visual cells arranged in a radial pattern like the sections of an orange
pigment cells which separate the ommatidium from its neighbors.
*The pigment cells ensure that only light entering the ommatidium parallel (or almost so) to its long axis reaches the visual cells and triggers nerve impulses. Thus each ommatidium is pointed at just a single area in space and contributes information about only one small area in the field of view.
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