DessectMe: The Arthropods
Amber Lyn Keating PAP Bio Mrs. Vu 1st period
A little bit about The Arthropods
- A phylum, Arthropoda has many creatures under their name.
- Segmented bodies are arranged into regions called "tagmata."
- Their nervous systems are dorsal and their circulatory system is open and ventral.
- They are symmetrical in that they are bilateral
- The Arthopods are divided into two families... The Chelicerates and the Mandibulates.
- Arthropods are the most diverse, widely spaced out phylum for all animals.
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FUN FACT!
- The Phylum Arthropoda has over 1 million species, most of them insects, most of those insects being beetles.
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Objectives
Background Information: The Crayfish
Life Cycle of Crayfish
Crayfish kills
Living as a Crayfish
FUN FACT!
After Crayfish mate, the female carries a cluster of eggs attached to her swimmerets. Swimmerets are feathery things under the crayfish's abdomen.
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Background Information: Grasshopper
Life of a Grasshopper
Grasshoppers Die
Living Preferences
FUN FACT!
A grasshopper with exceptionally long antennae are called Long-horned.
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Arthropods and the Integuentary System
Since the exoskeleton of an arthropod is a rigid structure, it must be shed and replaced periodically to enable growth. This shedding process is known as molting or ecdysis and consists of a series of four stages. First, enzymes are secreted that loosen the old exoskeleton layers. Second, the new exoskeleton layers are secreted. Third, the old exoskeleton splits and falls off. Finally, the new exoskeleton hardens and sets.
FUN FACT!
Arthropods are a highly successful group of animals- they account for over three quarters of all currently known living and fossil organism.
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