Download open circulatory system

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L, & Traci W, You
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Invertebrates are animals that have no backbone.
There are more than 1 million kinds of
arthropods on Earth.
An arthropod is an invertebrate with
an exoskeleton, a segmented body,
and jointed legs.
crayfish
• The body segmented, the segments usually
grouped in two or three rather distinct regions.
•
ex. 3 regions- Head, thorax, abdomen
•
(beetle)
•
ex. 2 regions- Cephalothorax (fused head &
•
thorax) and abdomen
• Exoskeleton ( called a carapace in crayfish) made
of chitin.
• Paired segmented appendages.
An exoskeleton is a hard, outer covering
made of chitin.
Molting is to leave an exoskeleton and
grow a new one.
A crustacean is an arthropod that has a hard,
exoskeleton, two pairs of antennae, and a
mouth for crunching and grinding.
Crustaceans can ________ certain parts
of their body.
A ___________ can re-grow its claws.
Most crustaceans live in ______ and get
oxygen from the water through _________.
Gills are
Digestion
• Tube from the mouth to the anus.
• Divided into sections: the foregut, the
midgut and the hindgut.
• Anterior ganglion or brain and paired nerve
cords.
• Some have developed sensory ability.
• Have an open circulatory system that
carries food, but not oxygen throughout its
body.
• Blood is often green since it does not carry
oxygen.
• The heart is a simple tube running along the
back.
Respiratory System
• Respiration by means of gills, or book lungs
and spiracles.
Reproduction
• The sexes nearly always separate.
• Fertilization is usually internal in land
species but external in aquatic species.
Excretion
• Passes waste out of its anus from the
hindgut.
• No nephridia.
* Centipedes and millipedes are arthropods
that have many legs.
* Have _______ pair of legs in each segment.
* Are carnivores and eat _________.
* To capture its prey, a centipede puts
_______ into the prey’s body with its_______.
* Centipedes are found in ___________ like
under rocks and in the soil.
* Centipedes and millipedes are arthropods
that have many legs.
* Have ___ pairs of legs on each segment.
* Eat _________ and are shy animals.
* When scared, it _________________ to protect
itself.
* Do not have ________.
* Are found in __________like under rocks and in
the soil.
* All have __________ legs.
* Have a body divided into two parts:
•______________________________
•________________________________
* Spiders usually eat __________, but some spiders
eat small _______________ like hummingbirds.
* Many spiders make webs out of _________.
* Silk is _________________________________.
* Spiders catch their prey in many different ways.
* Some spiders catch their prey in ____.
* Some spiders ________ from their prey
and then ________________________.
* When spiders catch their prey, it _______ it and
_________ it.
* Spiders breathe oxygen with __________.
* Scorpions usually live in __________ areas.
* Most scorpions are __________________.
** Nocturnal means ____________________
* During the day, scorpions hide __________
______________________________.
* When scorpions capture prey, they _______
___________________________________.
* Ticks and mites live on _______________.
* Some ticks and mites suck juices from
____________________.
* Other ticks and mites are very tiny and live
on __________.
* Many ticks suck the blood from _________.
* Ticks can give animals a ____________.
*There are more kinds of insects than there
are all other animal species all together.
* There could be _______________ times as
many insects as humans on Earth.
* Insects have a body that is divided into ____ parts.
* An insect’s body is divided into a ________,
a _____________, and a ___________ area.
* Insects have _____ legs connected to the chest part.
* Some insects’ legs are all the same size. Some
insects have one pair of legs larger than the other
two pairs.
* A grasshopper has one pair of legs larger than the
other two pairs. These larger legs are used for
____________.
Longer back legs
* Insects eat a lot, so they grow very fast. As they
grow, insects may molt and grow new ___________,
or they may change completely.
* A huge change in appearance is called ________.
* There are two kinds of metamorphosis:
______________ and ______________.
* Most insects live alone. But, some insects
are ___________ and cannot survive alone.
* These insects live in ______________ or hives.
* A colony is _____________________________
_______________________________________
* An amazing example of a colony is a __________.
* A beehive is ___________________________.
* All insects must protect themselves.
* Bees and wasps have _______________ to
protect themselves.
* Many other insects use ______________.
* Camouflage allows an insect to hide by ___
_______________________________.