Arthropods By: Amber Carr, Olivia Zulisky, Kayla Sabatine

What is an Arthropod? Bilaterally symmetrical organism with jointed appendages and an exoskeleton Arthropods include: ●crustaceans ●centipedes ●millipedes ●arachnids ●insects

How do Arthropods move? segmented appendages muscles attach to inside of skeleton and act as a lever system some have wings *how they move makes them able to live anywhere*

Nervous System Present simple dorsal brain linked to a ventral nerve Ganglia - group of nuclei (cluster of neurons) in brain located in the cerebral cortex

Digestive System One-way digestion Type of feeding depends on mouth structure. ●Carnivores ●Herbivores ●Detritivores ●Filter feeders ●Parasites

Excretory System Crustaceans and arachnids paired excretory organs Insects and some spiders have Malpighian tubules open into the intestine

Circulatory System ●Open ●Blood flows freely within body cavities ○direct contact with internal tissues/ organs ●Hemolymph ○Blood, intercellular fluid, and lymph

Respiratory System Aquatic gills Terrestrial tracheae and book lungs

Reproductive System Either Male or female (no hermaphrodites) Sexual reproduction *sperm is transferred to female via spermatophores*

Crustaceans live in water 5 pairs of jointed legs scavengers ~ specialized mouths to crush prey/claws crabs lobsters shrimp

Centipedes “100-legger” pairs of legs carnivorous spiders, worms venomous claws behind head

Millipedes “1,000 legger” pairs of legs detritivore eat damp or decaying wood, leaves, plants

Arachnids scorpion, tick, spider 2 body segments 8 legs fangs Tobias, Noah, and Harry

Insects stink bug, cricket, bee 3 body segments head, thorax and abdomen 6 legs

Other Phylum Facts Arthro | pods = joint | foot external covering made up of chitin thin tough for protection

Works Cited Britannica.com