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Insects - Online Essay

Insects

are neumerout invertebrate animals that belong in the Phylum Arthropoda
and Class Insecta. The class Insecta is divided into 2 subclasses: Apterygota,
or wingless , and Pterygota, or winged . Subclass Pterygota is
futher divided on basis of metamorphosis. that have undergone incomplete
metamorphosis are the Exopterygota. Insects that undergo complete metamorphosis
are the Endopterygota.

Insects have an outer bilateral exoskeleton to which the muscles are attached
to and provides protection for internal organs. The body is divided into 3 main
parts which are the head, which include mouthparts, eyes, and antennae; thorax,
which operate the jointed legs and /or wings; and abdomen, which ...

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The nervous system consists of a
brain receiving information from eyes, antennae, and controls the whole body and
2 nerve cords containing ganglia fused together to control activities of the
segment without the help of the brain. insect muscular system is made up of a
few thousand samll but string muscles allowing the insect to carry objects
heavier than it. The digestive system is basically a long tube where food enters
the mouth to the crop where it is stored, gizzard where it is grinded, stomach
where it is digested, then the undigested parts and wastes are moved to the
intestine, colon then released at the anus. And in the reproductive system, a
new individual is produced sexually when the female eggs produced in the ovaries
united with male sperm produced in the testes.

Both man and insect live almost everywhere, eat all kinds of food, and use all
kinds of materials to build homes so they constantly live in conflict. Some
insects seriously affect man's health and are ...

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Insects. (2008, August 2). Retrieved January 11, 2026, from http://www.essayworld.com/essays/Insects/87717

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"Insects." Essayworld.com. August 2, 2008. Accessed January 11, 2026. http://www.essayworld.com/essays/Insects/87717.

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PAPER DETAILS

Added: 8/2/2008 09:03:00 PM
Category: Science & Nature
Type: Premium Paper
Words: 458
Pages: 2

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