Echinodermata Presentation
Arthropoda
by Madelyn Coia
(Insects, Scorpions, Spiders, Lobsters, Trilobites)
Key Characteristics
• Exoskeleton containing chitin
• Bilateral symmetry
• Body segments grouped into specialized regions
• Jointed legs
• The jointed appendages are specialized for feeding, locomotion, and sensing
Anatomy
• Thorax- The chest (It also holds the wings if the insect can fly)
• Eyes- Compound eyes, (made up of several smaller eyes functioning in unison)
• Antennae- Antennae are the primary sensors of insects
• Abdomen- Stores digestive system, reproductive organs, and sting organs (if able to sting)
• The head- Main receptors are located (eyes, mouthparts, and antennae)
Digestion
• Foregut
• Midgut
• Hindgut
• Salivary Glands
• Alimentary Canal
Respiration
-Tracheae
-Spiracles
-Air sacs
- Circulation of air: Air is inhaled through the first four spiracles
-Carbon dioxide is exhaled through the remaining six pairs of spiracles.
Internal Transport
• Open circulatory system
• Dorsal vessel
• Aorta
• Haemocoel
• Ostia
Excretion
• Malpighian tubules
• Waste flows
• Nitrogenous waste
Response
• Double chains of ganglia
• Compound eyes.
• Tympanum
• Release specified pheromones
Movement
• Muscles are attached to the inside
• Fast and active
• Strength of muscle
• Flight muscles (direct attachment)
• Flight muscles (indirect attachment)
Reproduction
• Ovariole
• Ovaries
• Oviduct
• Spermatheca
• Ovipositor
• Horseshoe crab
• Scorpions
• Spiders
• Ticks
• Centipedes
Examples
Facts
• The word millipede means “1,000 legs,” but in fact no millipede has more than 750 legs.
• Arthropods outnumber all other types of animals combined, with an estimated 1 million species.
• An adult bedbug can survive up to one year without feeding.
• A typical bed usually houses over 6 billion dust mites
• Each year, insects eat 1/3 of the Earth's food crop.
Bibliography
• "A Guide To." A Guide To. N.p., n.d. Web. 21 Mar. 2015.
• “Arthropods.” The Learning Zone: Invertebrate I.D. N.p, n.d.
Web. 21 Mar. 2015.
• “Arthropods.” Arthropods. N.p., n.d. Web. 21 Mar. 2015
• "The Digestive System and Its Arthropoda Phylum." Digestive
System. N.p., n.d. Web. 19 Mar. 2015.
• "Science Explorations: Classify Insects: Zoom in on True Bugs:
Arthropods | Scholastic.com." Science Explorations: Classify
Insects: Zoom in on True Bugs: Arthropods | Scholastic.com.
N.p., n.d. Web. 20 Mar. 2015.
Bibliography (part 2)
• "CIRCULATORY SYSTEM." Circulatory System.
N.p., n.d. Web. 21 Mar. 2015.
• "Malpighian Tubules of Insects - Boundless Open
Textbook." Boundless. N.p., n.d. Web. 21 Mar. 2015.
