Arthropods Chapter 28 Characteristics of Arthropods 1. Arthropods
Arthropods Chapter 28 Characteristics of Arthropods 1. Arthropods share four main characteristics: A. Segmented Bodies i. Arthropods can have up to three sections
ii. Head, Thorax and Abdomen Three Body Sections Characteristics of Arthropods 1. Arthropods share four main characteristics: B. Exoskeleton (or outer shell) i. Prevents evaporation of water
ii. Used for protection Characteristics of Arthropods 1. Arthropods share four main characteristics: C. Jointed Appendages i. Examples: Legs, wings and antennae
ii. Give animal flexibility Arthropods 2. Shrimp, spiders and millipedes are all in the phylum ARTHROPODA Arthropods 3. Exoskeleton:
Tough, external covering that is a suit of armor to protect the animal. 4. Purpose = Protection! 5. Arthropod literally means arthros mean jointed
podos means foot or leg Example: Wing, Legs and Antennae Obtaining Food and Oxygen 6. Arthropods obtain food by: a. Scavengers: Eats dead plant and animals
b. Herbivores: Eating plants c. Predators: Eating animals they have killed Circulatory System 7. Arthropods have an open circulatory system. - Blood leaves the blood vessels and moves
through cavities. - Not the same as earthworms! 8. Molting Molting: Shedding of the exoskeleton Insects shed
their outer skeleton to grow Skin not flexible like ours Classification 9. Arthropods are classified based on the number and structure of
their body segments and appendages Groups of Arthropods Group of arthropod Antennae
Body Sections Mouth Parts/ Appendages Crustaceans (Crustacea) Two pairs Two or three body section
Spiders and Relatives (Chelicerates) Insects and Relatives (Uniramia) No antennae
One pair Two body sections Unbranched appendages (Insects have three sections)
Mandibles (chewing) Chelicerae (fanglike) Four pairs of legs Jaws
What is it? Organism Group How do you Know? Spiders and Relatives (Chelicerates
Two Body section Crustaceans (Crustacea) Two pair antennae Insects and Relatives
(Uniramia) Three body sections Crustaceans 11. Function of parts of crustaceans Cephalothorax: Fusion of the head with the thorax; houses most internal organs
Carapace: Exoskeleton that covers the cephalothorax Manible: Mouthpart adapted for biting and grinding food Chelipeds: Large claws that are modified to catch, pick up, crush and cut food Swimmerets: Flipper-like appendages for swimming Spiders and Their Relatives 12. Some Chelicerata include Horseshoe crabs, spiders, mites, ticks and scorpians
13. Chelicerae vs Pedipalps Both are appendages that are attached near the mouth and adapted as mouth parts Chelicerae contain fangs and used to stab and paralyze prey Pedipalps are longer and usually modified to grab prey Insects and Their Relatives
14. Centipedes, millipedes and insects belong to the subphylum Uniramia. Centipedes & Millipedes 15. Whats the difference? - millipede means thousand feet - centipede means hundred feet NO SIGNIFIGANCE!
Insects 16. Three parts of an insect: Head Thorax Abdomen Appendages found on same section on all insects Insects
17. Adaptations to respond to stimuli Compound eye to detect changes in color and motion Chemical receptors for taste and smell on mouthparts Chemical receptors also on their antennae and legs Adaptations for Feeding
18. Insects have various mouth parts in order to get food in a way that best fits them Metamorphosis Complete Gradual
Exothermic vs Endothermic. Exothermic. Endothermic. A chemical reaction that gives off energy. The reactants have more energy than is needed to form the products so they release it. I.e. gives off heat. A chemical reaction that absorbs energy.
BCIP and NBT: additional information Colorimetric blot Chemiluminescent detection using CSPD Dephosphorylation of CSPD by alkaline phosphatase to the metastable phenolate anion. Phenolate anion decomposes and emits light at a wavelength of 477 nm. Light emission is captured on X-rays.
Information on specific content knowledge affords teachers the ability to identify and address gaps in understanding that may limit student success in STEM-related occupational fields. Social Studies. Three parts for U.S. History. Grade-specific social studies content knowledge and analytical skills
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