Transcript Insects Grasshoppers

Insects
Grasshoppers
Grasshoppers
Kingdom – Animalia
 Phylum – Arthropoda
 Class – Insecta largest class on
earth live everywhere on earth but
the oceans
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Support and movement
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Skeletal system – exoskeleton- one that is on the outside of
the animal and it is divided into three parts (head, thorax,
and abdomen)
They must molt in order to grow the skeleton doesn’t grow
Take on air to pop the skeleton to help to break free from it
When they molt they have a soft skeleton at first then the
hardeners take over after several hours the skeleton is hard
Heavy and hard to get into small places
Protects it from the harsh environment
Muscle system
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Movement (muscle system) – six legs (all
insects have six legs)
two pair of wings
three pair of legs
jump and fly
muscles work these organs and allow it to be
motile
Food intake
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Digestive system – They have a mouth with
specialized parts for chewing and breaking up food.
They can also suck liquid with their mouth
Maxillae – upper lip – hold food salivary glands
Mandible – lower lip – chew food taste
Thorax – esophagus- crop – gizzard – midgut
(stomach) – intestine – anus
Eat grass and other plant materials
Will eat small insects
Food removal
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Excretory system – remove uric acid and
liquid wastes by way of the malipighian
tubes in the abdomen
solid waste leaves by way of the anus
Breathing intake of oxygen
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Respiratory system - spiracles open and let
Oxygen in the closed tracheal tubes located in the
chest or thorax of the body. These open and close
as the grasshopper walks and jumps.
cells that need oxygen then ask or request the
oxygen and then the tubes funnel it to the ones that
need it through out the body.
Partial closed system, not completely though
Blood Flow and movement of materials
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Circulatory system – open system, blood
pools to the needed areas and then is lost
after that and absorbed by the body as
wastes.
Aortic saddle (heart like organ)- enlarged
area on the dorsal vessel that helps to pump
blood to areas of the body
Oxygen is taken in by the tracheal tubes
then passed to the vessels and pooled
where needed
Responding to the environment
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Nervous system – there are three nerve masses
(ganglions) that work together to get information
through-out the body.
taste
Antennae (1 pair)
yes
smell / feel
Antennae (1 pair)
yes
see
Compound eye (2)
yes
head has a cerebral ganglion (called the brain)
that senses vibrations
nerve cord to pull all the ganglions and nerves
together
New offspring
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Reproductive system - They are sexual
reproducers. They have sexes male or
females.
females have an ovipositor to release eggs into
the ground once they are fertilized
males insert the end of their tail into the female
ovipositor and release sperm to fertilize the
eggs.
Under ground the grasshopper eggs hatch and
go through incomplete metamorphosis.
(nymphs – young adults)
Reproduction (cont.)
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Nymphs emerge from the ground and go
through several molting before becoming
an adult.
Sounds attract other grasshoppers to one
another. These sounds are made by
rubbing their legs together
They release pheromones into the air to
attract other grasshoppers too for mating,
this can also be used to warn others when
something has is about to happen.
Types
Quiz 4
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Draw and label the parts of a
grasshopper.
•Who am I? And how do you
know this?