Arthropods
All arthropods have this body covering made of chitin
What is an exoskeleton
This is covered in a single plate called the carapace.
What is the cephalothorax?
Arachnids have this many pairs of walking legs.
What are four pairs of walking legs.
Insects boast this many pairs of walking legs
What are three pairs of walking legs
Adult echinoderms usually do not have these
What are anterior and posterior ends (they also lack cephalization)
This class contains the largest arthropods
What is Class Crustacea?
These aid in swimming as well as reproduction.
What are swimmerets?
Respiration is done through these organs in arachnids
What are book lungs
Houseflies can "taste" sugar with these appendages, which are 10 million times more sensitive than a human tongue
What are their feet (tarsi)
This unique hydraulic system found only in echinoderms uses seawater pumped through canals to extend and retract hundreds of tiny sucker-like structures, allowing the animal to move slowly, grip surfaces, and even pry open prey like clams
What is a water vascular system
These are the three divisions of the body in arthropods
What is the thorax, abdomen, and cepholothorax?
The pyloric stomach contains these to aid in digestion
What are "teeth"?
Spiders weave webs using this material
What is spider silk
This elaborate system of tubes provides oxygen to the tissues of insects.
What are tracheas?
These major consumers of sea kelp can destroy whole forests of kelp if their numbers grow too large
What are sea urchins
Arthropods have this type of nervous system
What is a ventral nervous system?
A crayfish's brain is comprised of two of these.
What are ganglia?
Spiders use these two parts to bite and stun their prey
What are fangs and venom glands
Insect development consisting of four stages: egg, larva, pupa, and adult.
What is complete metamorphosis
These warty, mobile creatures can live in the abyssal zone of the ocean
What are sea cucumbers
Arthropods are always bleeding internally because of this system
What is an open circulatory system?
A crayfish's heart rests in this cavity.
What is the pericardial sinus?
Air enters the exoskeleton of a spider through this slit in the abdomen
What is a spiracle
Members of this order of insects have membranous wings and are social insects.
What is Hymenoptera
This creature was discovered in 1986 off the coast of the Bahamas and New Zealand and are placed in their own class
What are sea daisies