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Characteristics of Arthropods

By Katie and Kayley

Kayley Alonso

on 2 May 2013

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Transcript of Characteristics of Arthropods

What are Arthropods? Characteristics of Arthropods By Katie Bowen and Kayley Alonso Characteristics of Arthropods Invertebrates Have exoskeletons Have jointed legs Jointed legs A segmented body An exoskeleton Pairs of jointed legs Most have eyes and one of more pairs of antennae Head Thorax Abdomen Molting Process: 1. Animal wiggles out of old exoskeleton 2. A new, soft exoskeleton emerges that had been growing underneath 3. Animal makes itself as large as possible, stretching new skeleton before it hardens 4. Once stretched, skeleton dries and becomes hard Exoskeleton Functions: The Major Classes of Arthropods Protects against enemies and weather Prevents the animal from drying out Provides support for body organs Allows a place for muscles to attach Allows for movement Antennae Primary sense organs of arthropods Extremely sensitive to chemical stimuli Detects food, enemies, and potential mates Eyes Simple Eyes: Compound Eyes: One lens Made up of hundreds of simple eyes called facets Detect motion and color Sensitive to changes in light Crustaceans Arachnids Insects Millipedes Centipedes Thanks For Watching! Arthropod Lungs Spiracles: Lead to system of air tubes, which branch into smaller tubes When air enters through spiracles, it travels through tube system Oxygen passes from tubes into the cells, CO2 passes into the tubes and is carried outside the body
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