Insects

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Term Paper Title	Insects
# of Words	441
# of Pages (250 words per page double spaced)	1.76

Insects

Insects

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 insects, and Pterygota, or winged insects. Subclass Pterygota is
futher divided on basis of metamorphosis. Insects 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 has organs for
digested food, reproducing, and getting rid of waste products.

The major systems in insects are the circulatory, respiratory, nervous,
muscular, digestive, and reproductive systems. In the circulatory system, blood
is pumped by the heart in a tube to the aorta, the head, and to other organs
then enters the ostia openings along the sides of the tube back to the heart.
The respiratory systems carries O2 to cells and takes away CO2 from cells
through branching out to call cells of body. 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...

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