What do centipedes,
horseshoe crabs, and
scorpions have in
common?
By: Justin Lloyd
Brad DeBoy
Alec Hawkins
Tyler Koslofsky
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Appendage- Any
complex part or organ
extended from the
body.
ArthropodSegmented animal
with jointed
appendages and a
exoskeleton
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CheliceratesIncludes spiders,
scorpions , mites,
ticks, sea spiders, and
horseshoe crabs.
Chitin- clitellum of
each worm secretes a
tube made of mucus
and tough
carbohydrates
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Crustaceans- An
Arthropod with
mandibles and
branches appendages.
Exoskeleton- The
hard, external cover of
some invertebrates
that provides
protection and
support.
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Molting- The process
of shedding an
exoskeleton or any
other outer layer of an
animal.
Spiracles- An
external opening of a
trachea in an insect
myriapod spider.
UniramiansCentipedes,
millipedes, and insect.
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1. A hard outer body covering called an
exoskeleton
2. Specialized mouth parts
3. Jointed legs
4. Compound eyes
5. Segmented body parts
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Arthropods have segmented bodies
Body sections bear jointed extensions called
appendages (ex: legs+ antennae)
Have an exoskeleton that provides protection
and support
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Made up of 3 sections secreted by the
epidermis
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1st layer is waxy and composed of a mixture of
protein and lipids
2nd layer is comprised of protein and chitin and
provides primary protection
3rd layer contains proteins and chitin
 Is flexible at the joints to allow movement
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Has a high level of cephalization meaning that
it has many sensory organs and appendages in
one region
Have segmented antennae and compound eyes
that have individual light receptors
Sensory organs send nerve impulses to the
brain that coordinates movement
Have open circulatory systems
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Arthropods molt their exoskeleton to allow for
growth.
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Crustaceans have an exoskeleton, two parted
limbs, and nauplius larvae (their eggs).
Examples: Crabs, Lobsters, Shrimp
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They have segmented bodies with jointed
limbs.
They have open circulatory system.
They used to be predators, but are now mostly
involved in mutualism, and scavenging.
Examples: Horseshoe Crabs, scorpions,
spiders, mites, harvestmen (Daddy Long
Legs), ticks.
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They have exoskeletons, and jointed
appendages.
Legs are only one branch
they are interterrestrial.
They have antennae.
Examples: Insects, centipedes, millipedes,
and beetles.
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http://www.youtube.c
om/watch?v=UFe3cZ
LuhUs
http://www.youtube.c
om/watch?v=DX_rgH
HWwv8
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“Baby You’re an
Arthropod”
Tarantula Song