Housefly-life-cycle-2 - the microscope Diagram to show the...

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Housefly feeding When a housefly feeds, it applies its proboscis to the food source and secretes saliva on to the food. The saliva digests the food to a liquid which is then sucked up through the proboscis. The proboscis is normally folded back under the head, but is extended to touch the food when feeding compound eye proboscis ‘brain’ muscles for pumping up liquid food gut salivary gland salivary duct channels conducting saliva and liquid food channels carrying saliva and liquid food Housefly proboscis seen under
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Unformatted text preview: the microscope Diagram to show the structure of the food channels Section through head of housefly House flies and disease The housefly is an indiscriminate feeder. At one moment it could be feeding on decaying rubbish or even human faeces, and the next minute on food for human consumption. Consequently its proboscis (and its legs) can carry harmful bacteria, particularly intestinal bacteria, and so spread disease. It is important to keep houseflies away from our food © D.G. Mackean...
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This note was uploaded on 11/29/2011 for the course BIO 218 taught by Professor Young during the Fall '11 term at BYU.

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