1. Phylum Arthropoda

2. General Characteristics
Segmented body - head, thorax, abdomen
Exoskeleton –
Made of chitin (firm/leathery  tough/hard)
Terrestrial have waxy covering that prevents water loss
Outgrow the exoskeleton  molt (shedding of exoskeleton)
Jointed appendages

3. General Characteristcs
Classified by the number/structure of body segments/appendages, particularly their mouth parts
Crustaceans – (aquatic) crabs, shrimp, lobster, crayfish, barnacles
Chelicerates – horseshoe crabs, spiders, ticks, scorpions
Uniramians – centipedes, millipedes, insects

4. Feeding Method Herbivores, carnivores, omnivores
Variety in mouth parts allow variety in types of food consumed

5. Respiration Terrestrial Aquatic – feathery gills Tracheal tubes
Spiracles – small openings on side of body where air enters/exits tracheal tubes
Book lungs – layers of respiratory tissue stacked like pages in a book
Aquatic – feathery gills

6. Circulation & Excretion
Open circulatory system
Excretion:
Terrestrial
Malpighian tubules – saclike organs that extract wastes
Aquatic – diffusion

7. Response Brain Ganglia – help control movement
Sense organs – eyes & taste receptors

8. Movement
Have muscles (individual cells) – pull against exoskeleton which generates movement

9. Reproduction Terrestrial – internal fertilization
Aquatic – internal or external

10. Incomplete Metamorphosis Complete Metamorphosis
Life Cycles
Adult
Adult
Eggs
Eggs
Incomplete Metamorphosis
Complete Metamorphosis
Larva
Adult
Nymph
Nymph
Immature
Larva
Nymph
Adult
Pupa