The Arthropod
Arthropods have a body which is
divided into three parts : a head,
a thorax and an abdomen.
Body
The body is made up of many segments
joined together. These segments help
the arthropod to move with ease.
Compound Eye
Some arthropods' eyes receive
a multiple image. The compound
eyes are able to detect even
the slightest movement.
Wings
Wings are attached to the
thorax of the arthropods that fly.
Tympanum
The first segment of the abdomen
of the arthropod has an oval eardrums.
The oval eardrum is called the tympanum.
Mouth
The mouth of the arthropod is
an opening between the two heavy jaws.
The mouth contains teeth for chewing food.
Sound Receptors
Some arthropods have
sound receptors on their forelegs.
Head
The head of many arthropods is dominated
by a pair of large compound eyes.
Appendages
Appendages are jointed limbs.
Appendages help the arthropod move.
Some appendages have special shapes
and uses such as for swimming, for
getting food and for walking.
Antennae
The two antennae are used as sense receptors
for touch and for smell in some arthropods.
Occeli
The three simple eyes of the arthropod
are called ocelli. Ocelli are light-and-shade
sensitive and may be able to form
crude images at close range.
Thorax
The thorax is the second division of
the arthropod's body, often consisting
of three segments. each segment
has a single pair of legs.
Exoskeleton
The exoskeleton is the hard covering
on the body. It is made of a tough material
called chitin. The exoskeleton protects
the soft body of the arthropod.
Exo : means outside
Abdomen
The abdomen is the hindmost body
division of the arthropod and consists
of eleven segments. The last segment
is modified for reproductive purposes.
Anus
The anus of the arthropod is
an opening behind the last
segment of the body.
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