insect-structure-06 - up their nectar. Aphid Mosquito Honey...

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Insect structure and function 6 Feeding methods Insects have three types of mouthparts on their heads; the mandibles (jaws), maxillae and labium . These are modified in various ways which adapt the insect to its method of feeding. The head of the cockroach shown below shows the basic form of unmodified mouthparts. The mandibles cut off pieces of food and crush them before they are swallowed. The other mouthparts help select the food and manipulate it between the jaws Maxillae and labium cut away to show mandibles compound eyes gut mandibles maxilla labium Head of cockroach to show mouthparts muscles which move mandibles The butterfly’s mouthparts form a tube which, when uncoiled, is inserted into flowers to suck
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Unformatted text preview: up their nectar. Aphid Mosquito Honey bee In these three insects, the mouth parts are elongated and, in the case of mosquito and aphid, are modified to pierce skin and plant tissue respectively to suck up blood or plant juices. The honey bees proboscis is modified to probe into flowers and suck up nectar The houseflys labium is elongated and forms a pad at the end. The pad is placed on the food, saliva is secreted and the food is dissolved and sucked up Butterfly Housefly D.G. Mackean labium mandibles and maxillae mandibles and maxillae skin leaf labium mandible labium labium proboscis antenna...
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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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