Arthropods General Characteristics All have jointed legs Evolved
- Slides: 55
Arthropods
General Characteristics • All have jointed legs • Evolved from annelids (segmented worms)
• All have an exoskeleton made of chitin • All have bilateral symmetry
WOW BEHAVIOR! • All molt- shed skin to allow for growth (lobster example) • Spiders molt too
Body Arrangement • All have 3 body segments – head, thorax and abdomen
Arthropods all have an open circulatory system “Blood” is confined to vessels for only a small portion of it’s circuit through the body.
FIVE CLASSES • • • Centipede – one pair of legs per segment Millipede- two pair of legs per segment Insects- 3 pair of legs per thorax Arachnids- 4 pair of legs per thorax Crustaceans-5 pair of legs per thorax
Centipedes
• Centipedes have 1 pair of legs per body segment. Legs
Defenses Have large poisonous fangs on their first appendages.
Centipede • Name means 100 feet. Do they have 100 feet?
Centipedes • Have longer antennae than other animals in the same class. • Antennae are sensory organs, used for touch and smell
Feeding • Usually are carnivorous, eating other arthropods • Eat snails, slugs, and worms
Millipedes
Millipedes • Millipedes have 2 pair of legs per segment. • Body has many segments; as many as 100
Millipedes • Generally not poisonous to humans
Millipedes Name means 1000 feet. Does it have 1000 feet?
Millipedes • Millipedes spit cyanide acid at prey.
Insects Far out!!
Insects have 3 pairs of legs on their thorax
INSECTS undergo metamorphosis • Complete metamorphosis: – Egg – Larvae – Pupa – adult
INSECTS undergo metamorphosis • Incomplete metamorphosis: – Egg – Nymph – adult
Insects have 3 simple eyes between two compound eyes
Insects breathe through holes in their sides (usually the thorax) called spiracles
Many insects have camouflage
More Camouflage
Insects mimic environment
Flight was an evolutionary advantage to insects • Damselfly goes from water to flight Drosophila flight Common blue damselfly
The miraculous honey bee! • Honey bees and relationship to humans
Wild and wonderful Praying Mantis at the snake buffet Weevil family Amazing Mantis!!
Wild and wonderful Monarch butterfly Swallow tail species Viceroy butterfly
Arachnids
Arachnid Includes Mites Spiders scorpions
Arachnids have 4 pairs (8)of legs
All spiders have 2 pair of mouthparts
Spiders have fangs
Arachnids breathe by book lungs
Horseshoe Crabs are more closely related to arachnids then to crustaceans.
Malpigian tubules are used as kidneys to filter the “blood”
Arachnids produce a strong elastic silk from spinerettes to build a web to capture their prey
Cephalothorax is the head attached to the thorax.
Vision Only have simple eyes
Arachnids have poison to kill their prey Brown Recluse
Arachnid feeding Arachnids use enzymes to dissolve food before ingestion.
Camel Spider Real spider Trick photography
Crustaceans
Crustacean • Crustaceans all have a cephalothorax • Examples are crayfish, shrimp, lobster, and crabs
Most are aquatic • EXCEPT – rolly polly (pill bugs)
Locomotion Have 5 pairs of appendages Crustaceans have a special appendage used for swimming called a swimmerets
Green Gland Have an organ called the green gland: which regulates the amount of salt and water in the body
Carapace – hard outer shell – protects inner organs
Internal Anatomy
Amount of Legs • All crustaceans have five pair of appendages • And crustaceans have two pair of antennae
General Information • Crustaceans breathe though gills • Mostly scavenge for food
• Some have a long appendage called a telson-tail
- Joint footed animals are called
- Joint legged animals
- Chapter 26 section 3 insects and their relatives
- Segmented and jointed body
- Segmented bodies and jointed legs
- Jointed legs meaning
- Amphibians are thought to have evolved from
- Some animals are dangerous *
- What do arthropods have in common
- Characteristics of arthropods
- Jointed foot
- Arthropod characteristics
- Arthropoda characteristics
- Arthropods characteristics
- Arthropod groups
- Galapagos finches evolved partly due to
- Beak of finches lab
- Galapagos finches evolved partly due to
- French bean variety pusa parvati is evolved through
- Halloween falls on october 31 every year.
- Evolved analytics
- Evolved packet core
- Primates
- The cult of dionysus theater
- It's got four legs
- Do snails have legs
- Feathers, laying eggs, small, i can sing & fly
- Bee has 6 legs
- Whales have vestigial legs. this suggests they _____.
- I got eight
- Why do camels have long legs with leathery knees
- Whales have vestigial legs. this suggests they _____.
- Name
- Shape with 6 faces 8 vertices and 12 edges
- Protostomes are
- Tagmata adalah
- Jointed foot
- Segmented coelomates
- Arthropods
- Section 28-3 insects
- Summary of hygiene
- Ascaris lumbricoides
- Arthropods circulatory system
- Arthropods structure
- Section 28-1 introduction to the arthropods answer key
- Chelicerates
- Chapter 28 arthropods and echinoderms
- Arthropods vs annelids
- Section 28-1 introduction to the arthropods
- Are flukes arthropods
- Introduction of arthropods
- Introduction of arthropods
- Chapter 26 section 1 arthropod characteristics answer key
- Phylum arthropoda common name
- Head thorax abdomen
- Subphylum mandibulata