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L o Phylum: Arthropoda Phylum: Arthropoda. l o Arthropoda Origin of the word Arthropoda: Jointed Foot Common Examples: Insects, Spiders, Crabs Symmetry:

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Presentation on theme: "L o Phylum: Arthropoda Phylum: Arthropoda. l o Arthropoda Origin of the word Arthropoda: Jointed Foot Common Examples: Insects, Spiders, Crabs Symmetry:"— Presentation transcript:

1 l o Phylum: Arthropoda Phylum: Arthropoda

2 l o

3 Arthropoda Origin of the word Arthropoda: Jointed Foot Common Examples: Insects, Spiders, Crabs Symmetry: Bilateral Type of body cavity: Coelomate

4 General Arthropod Body Plan

5 Characteristics of Arthropods Early arthropods: have appendages on each segment Modern arthropods: have appendages on a few segments. 1)Jointed appendages: Arms and legs with freely moving joints.

6 Specialization of Appendages Functions of Appendages: 1)Running 2)Catching prey 3)Feeding (Sharp mandibles) 4)Swimming 5)Reproducing 6)Sensory reception

7 Exoskeleton 2) Exoskeleton: Strong chitin shell found on the outside of the organisms body Used for: - Protection - Skeleton to support muscle - Prevent desiccation (drying out)

8 Exoskeleton Molt: The exoskeleton is not capable of expanding. When the organism inside the exoskeleton grows too large it must form a new exoskeleton inside the old one. When the new one is ready it will shed the old one. Once free the new exoskeleton expands and hardens

9 Segmentation 3) Segmentation in arthropods: Segments are fuse into regions.

10 Nervous System Arthropod Nervous System: Three parts 1) Brain 2)Ventral solid nerve cord 3) Sense organs: - Antennae - Simple eyes - One pair of compound eyes Compound eyes produce a clearer image then the mammalian eye

11 Subphylum: Crustaceans Crustaceans: Have high levels of calcium in their shells - Mainly marine arthropods. Barnacles, crabs, lobsters and shrimp - Freshwater examples include crayfish, freshwater crabs and shrimp. - Land examples include pillbugs

12 Subphylum Uniramia Subphylum Unirami: Insects Entomology: The study of insects Characteristics of insects: 1)Three parts of the body: head, thorax, abdomen, 2)One pair of eyes and several smaller eyes

13 Subphylum Uniramia Subphylum Unirami: Insects Entomology: The study of insects Characteristics of insects: 1)Three parts of the body: head, thorax, abdomen, 2)One pair of eyes and several smaller eyes 3)One pair of antennae 4)Specialized mouthparts

14 Subphylum Uniramia Subphylum Unirami: Insects Entomology: The study of insects Characteristics of insects: 1)Three parts of the body: head, thorax, abdomen, 2)One pair of eyes and several smaller eyes 3)One pair of antennae 4)Specialized mouthparts 5)One or two pairs of wings - Escape enemies - Finding food - Mating - Dispersing offspring

15 Subphylum: Chelicerates Subphylum: Chelicerates (Arachnids Scorpions, Spiders, ticks, mites) 1) 6 pairs of appendages -2 chelicerae -2 pedipalps -4 pairs of walking legs 2) Two body parts: -Cephalothorax: Head and legs -Abdomen: Contains the organs

16 Assignment Vocab:


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