PANORAMIC SIGHT FROM THOUSANDS OF LENSES
The hexagonal shaped lenses constituting the eyes of a fly provide
a much larger area of vision than an ordinary lens does. In some flies,
the number of these lenses may sometimes be as many as 5,000. Additionally,
the spherical structure of the eye also enables the fly to see its
back, and thus gives it a great advantage over its enemies.
THE ABSORBENT PUMP OF THE FLY: PROBOSCIS
Another specific feature of flies is the way they digest food.
Unlike many other living organisms, flies digest food not in their
mouth, but outside their bodies. They pour a special liquid over the
food by means of their proboscis, which puts the food in the proper
degree of consistency for absorption. Then the fly absorbs the food
with the absorbent pumps in its throat.