Invertebrates - Arthropods

arthropods

insects, spiders, lobsters

arthropods are the ____________ species

largest

what species are in arthropoda

terrestrial, aquatic, aerial

body plan

bilateral

Protosome or deuterosome?

protosome

arthropoda have a _____________ digestive system

complete

diet

herbivores, carnivores, parasites, or scavengers

muscular system

jointed appendages for walking, swimming, catching prey

body segmentation

- head, thorax, abdomen
— cephalothorax and abdomen
— head and trunk
- chitinized exoskeleton
— they molt

hemocoel

central cavity, fluids inside are moved by contraction of dorsal blood vessels

how is nitrogenous waste removed in crustaceans

green gland

how is nitrogenous waste removed in insects

malpighian tubules

nervous system

throughout all segments

aquatic species respiratory system

gills

insects respiratory system

series of tubes, called tracheae, throughout body, open to the surface via spiracles

reproduction

— most are diecious and reproduce sexuay (internal fertilization)
— some are monecious, some reproduce parthenogeneticay

subphyla tribolta

all extinct marine species

subphylac

- mostly terrestrial but some aquatic
— first set of appendages (chelicerae) are distinct
— horseshoe crabs, spiders, mites, ticks, scorpions

subphylam

— terrestrial
— "numerous legs"
— 10-750 legs
— millipedes, centipedes
subphyla crustacea

suphyla chelicerata

— mostly terrestrial species
— first set of appendages unique
— horseshoe crabs, spiders, scorpions

subphyla myriapoda

— terrestrial
— many legs
— millipedes, centipedes

suphyla crustacea

— mostly aquatic
— shrimp, crabs, krill

subphyla hexapoda

— terrestrial
— insects
— complete or incomplete metamorphosis
— well developed digestive, nervous, respiratory systems
— circulatory system with multiple hearts