Upload
marybeth-carpenter
View
259
Download
0
Embed Size (px)
Citation preview
CLASS INSECTA
CLASS ARTHROPODA
CLASS MYRIAPODA
CLASS CRUSTACEA
SYMMETRY: Bilateral
REPRODUCTION: Sexual
MOVEMENT: varies (most have legs to move on)
FOOD: Carnivores and Herbivores
4 CHARACTERISTICS: EXOSKELETON
JOINTED APPENDAGES (as seen above: jointed legs)
SEGMENTED BODY (as seen above: Head, thorax, abdomen)
OPEN CIRCULATORY SYSTEM
IN GREEK: Jointed legs
Jointed legs
OPEN CIRCULATORY SYSTEM: Blood is pumped into body cavities where
tissue is surrounding this cavity. The oxygen and nutrients diffuse into the tissues and then into the cells.
CLOSED CIRCULATORY SYSTEM:
Blood is pumped through vessels (veins and arteries) throughout the body. The blood is always in a closed tube.
EXOSKELETON: We have an internal skeleton, where arthropods
have an external skeleton. They have NO bones on the inside, only a hard skeleton on the outside they must “MOLT” to grow.
MOLTINGAll arthropods must molt, or shed their outer
skeleton to grow or change their shape. Molting is controlled by hormones within the body of the arthropod.
GREEK FOR: Hard exoskeletonContain two pair of antennae and mouth parts
for crushing and grinding food.Crustaceans breathe through the use of GILLS.
Here are some examples:
Hermit
crabs Lobster
s
Barnacles
Daphnia
Shrimp
millipedes
“thousand-leggers”
centipedes
Centipedes are Carnivores. Millipedes are herbivores
Why are we always found in damp places, like under rocks?
Our exoskeletons are not waterproof, so we live in damp places because we don’t want to lose excess water.
TICKS
SCORPONS
SPIDERS
MITES (DUST MITES)
ALL HAVE 4 OR 8 LEGS
2 MAIN BODY SEGMENTS:•HEAD/THORAX •ABDOMEN
Arachnophobia
3 BODY SEGMENTS
ALL HAVE 6 LEGS ATTACHED TO THE THORAX (CHEST)
PHEROMONES – HORMONES THAT ATTRACT MATES
STINGERS, CAMOUFLAGE, POISON, SPINES, ETC.
METAMORPHOSIS – to transform