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Insect physiology included the physiology and biochemistry of insects organ systems. Although diverse, insects are quite similar in their design both internally and externally. Insects have three main regions head, thorax and Abdomen. Hence in this essay the general physiology of the insect has been discussed to avoid some of the common naming mistakes that are made students.
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|wordcount || ||4108 (cca 11 pages)
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Preview of the essay: INSECT PHYSIOLOGY.
Insects mouth parts are modified according to the food eaten such as sucking lapping and chewing mouths.
The abdomen comprises of eleven segments and it houses digestive organs (Mc Gavin, 2001) and other systems such as circulatory system, respiratory system and nervous system.
Nutrition is defined as a series of processes by which an animal takes in and assimilate the various foods that are needed to promote growth and replace worn out tissues.
In common with many living things insects require water large amount of selection of amino acids, a source of sterols, vitamins, fatty acids and large number of inorganic substances.
(a) Dietary requirement of insects.
Insects have diverse feeding habit. They obtain their requirement by means of flexible feeding behaviour and nutrition utilization (Slansky, 1993). Their feeding may be monophagous that is restricting its diet to single source. It may also be polyphagous which is feeding on wide variety of food. Some insects do not feel at all at adult stage because they obtain their food when immature.
The degree of dietary diversity has an importance consequence for insect ecology.
Despite dietary diversity among insects there are basic necessities for growth, development and maintenance ...
... parts and their mode of feeding depends on species. They show distinct behaviour and a good example are bees, ants, and termites. These live in colony’s while other line individually. Social insects have division of labour in their colonies such as workers reproductive such as queen. To some extent, the food fed and the biological make up determines the caste of an individual. Social insects show foraging behaviour in feeding and communication. The unity of social insects is largely cemented by pheromones which play important role in rearing queen and young ones, inhibiting female workers from developing reproductive organs, discarding the dead insects, ant swarming. The social –economic importance of social insects is also described as provision of income, pollination and destructing of structures. ----------------------- Queen after being fertilized by a drone Unfertilized eggs Fertilized eggs Hatch into larva Hatch in to larva Fed on royal jelly then honey and predigested pollen Royal jelly replaced by honey Royal jelly continued Pupae Pupae Pupae Drones, fertile males, Reduced mouthparts Workers, sterile females, developed sucking mouth parts Queen, fertile female reduced mouth parts
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