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B
Haustellum
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C
Basiproboscis
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D
Labella
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Solution
The correct option is D Labella House fly has sponge-like organs called the labella. The labella is a complex structure having many grooves. These grooves are called pseudotrachea. This takes up liquids like sponges. Salivary secretions from the labella help to dissolve and collect food particles so that they may be more easily taken up by the pseudotrachea. The liquid food is then drawn up through the food channel into the esophagus. The labrum is located between the maxillary palps.