Arthropods! Do Now: 1.Turn in Earthworm dissection

Phylum Arthropoda Biggest phylum of animals currently alive and extinct. Several _________ different species Exist in every environment, in almost every ecosystem on Earth. By any measure, the most “successful” animal phylum. ______ of all known species of animal are arthropods.

What Makes an Arthropod? _______________: – Hard, protective outer “shell.” – Used for movement – contains_________, a ________________.

Exoskeleton for ___________________ Your muscles are attached to an _______________. An exoskeleton serves the same purpose

What Else Makes an Arthropod? ____________________ symmetry

_______________________ body plan Each segment has at least 1 pair of _____________. – Legs, antenae, flipers, claws, etc. are all appendages. – Some segments may be fused together.

3 Main Body Sections Called _____________: Some may be fused

___________ Appendages (and lots of ‘em)

Recap: Arthropod Characteristics ____________________________ ___________________________ symmetry Segmented body plan (3 ___________: head, thorax, abdomen) Jointed appendages (many pairs). Note: arthropod means “________________________.”

Arthropod Circulatory System ________________ circulatory system with heart.

Arthropod Respiration Gills/__________________: oxygen diffuses into blood ________________: air moves into insect directly

Types of Arthropods Domain: ____________ Kingdom: ___________ Phylum: Arthropoda Classes: ________________________________________ ________________________________________

The Family Tree

Class Crustacea: The Crustaceans Only arthropod class with ________________ _____________________________________.

Includes crabs, lobsters, shrimp, as well as ___________. Class Crustacea: The Crustaceans

Crustacean Orders “True” Crustaceans = Order ________________ – 5 pairs of legs – 2 tagmata Cephalothorax Abdomen “Pillbugs” = Order _________ – 7 pairs of legs – 3 tagmata

Class Insecta _____________ of antennae ____________ of legs ______ tagmata Wings or wingless

Insect Diversity Biggest order of animal on Earth Over ______________ documented species. Highest estimates suggest up to 30,000,000 species may exist.

Class ____________________: Spiders, Ticks, Scorpions, Mites, etc. _______ antennae __________ pairs of legs

Arachnids Trilobites = Extinct Arachnids

Centipedes And Millipedes: Class Myriapoda _____________of antennae. Two tagmata: _____________ and _________ 2 pairs of legs per segment Millipede subclass diplopoda 1 pair of legs per segment centipede subclass chilopoda

Recap: Arthropod Family Tree Phylum Arthropoda Deca- poda Iso- poda many ordersmany orders, including extinct trilobites Chilo poda diplo poda