ArthropodsArthropods

The “Jointed Foot”The “Jointed Foot”

CreaturesCreatures

Characteristics of Characteristics of ArthropodsArthropods

Arthropods have an exoskeleton made of Arthropods have an exoskeleton made of Chiton and Proteins, Bilateral Symmetry, Chiton and Proteins, Bilateral Symmetry, Coelomate, and jointed structures called Coelomate, and jointed structures called Appendages.Appendages.

The appendage can be used for a variety of The appendage can be used for a variety of functions including: sensing, walking, functions including: sensing, walking, feeding and mating.feeding and mating.

Arthropods must molt to grow. Arthropods must molt to grow.

Respitory structuresRespitory structures Arthropods have a variety of methods of Arthropods have a variety of methods of

Respiration. Respiration. Draw the 3 examples of them on page 764 in the Draw the 3 examples of them on page 764 in the

Biology textbook.Biology textbook. Many have simple eyes (used for light detection) Many have simple eyes (used for light detection)

and compound eyes.and compound eyes. Terrestrial arthropods excrete waste through Terrestrial arthropods excrete waste through

Malpighian tubules located on the abdomen.Malpighian tubules located on the abdomen. Some Arthropods reproduce by Parthenogenesis, Some Arthropods reproduce by Parthenogenesis,

development of an unfertilized egg.development of an unfertilized egg.

ArachnidsArachnids

Spiders, Scorpions, Mites and ticksSpiders, Scorpions, Mites and ticks First set of appendages are called the Chelicerae First set of appendages are called the Chelicerae

which often are modified into pincers or fangs.which often are modified into pincers or fangs. Second appendages are called pedipalps which Second appendages are called pedipalps which

handle food or are used for sensing.handle food or are used for sensing. 2 major body segments: Cephalothorax and 2 major body segments: Cephalothorax and

abdomen.abdomen.

Camel Spider Pictures Camel Spider Pictures from Iraqfrom Iraq

CrustaceansCrustaceans

Only group of arthropods that have 2 sets of Only group of arthropods that have 2 sets of antennae for sensing.antennae for sensing.

Jaws move from side to side.Jaws move from side to side. Eyes located on Stalks.Eyes located on Stalks. Include: Crabs, Lobsters, Shrimp, Crayfish, Include: Crabs, Lobsters, Shrimp, Crayfish,

barnacles, water fleas and sow bugs and pill barnacles, water fleas and sow bugs and pill bugs.bugs.

Most breath through sets of feathery gills Most breath through sets of feathery gills underneath a carapace.underneath a carapace.

Water FleasWater Fleas

Centipedes and Centipedes and MillipedesMillipedes

Centipedes, class Chilopoda are all carnivores. Centipedes, class Chilopoda are all carnivores. Bites can be painful to humans. Malpighian Bites can be painful to humans. Malpighian tubules are used for waste. tubules are used for waste.

Millipedes, class Diplopoda are herbivores that Millipedes, class Diplopoda are herbivores that feed on decaying materials. Millipedes do not bite feed on decaying materials. Millipedes do not bite but can emit an obnoxious smell if disturbed.but can emit an obnoxious smell if disturbed.

Horseshoe CrabsHorseshoe Crabs

Class MerostomataClass Merostomata Very Ancient animals unchanged since Very Ancient animals unchanged since

the Cambrian era (500 million years ago)the Cambrian era (500 million years ago) Feed on seaweed, worms and molluscs.Feed on seaweed, worms and molluscs. Have blue blood due to the chemicals in Have blue blood due to the chemicals in

it.it. Draw a picture on page 771 of the Draw a picture on page 771 of the

horseshoe crab.horseshoe crab.

InsectsInsects

Class Insecta- Only one species is Marine Class Insecta- Only one species is Marine Almost 7/10 animals are Insects!Almost 7/10 animals are Insects! All insects undergo some form of All insects undergo some form of

metamorphosis.metamorphosis. Draw the picture of the Grasshopper on page Draw the picture of the Grasshopper on page

772 and label and explain the function of the 772 and label and explain the function of the following body parts: Antennae, Tympanum, following body parts: Antennae, Tympanum, Malpighian Tubules, Spiracles.Malpighian Tubules, Spiracles.