Study Guide for test
• Exoskeleton made of chitin
• Segmentation
• Jointed appendages
1. 1st pair of Appendages on Crustaceans:
Chelipeds – used for collecting and manupilating
food (catch, pick up, crush, cut)
2. Organs that contain silk glands, force silk
through these.
3. Covers the cephalothorax. Protects the gills
4. Respiration (Breathing)
5. Grab prey
7. Appendages that contain fangs used to stab and
paralyze prey with venom.
8. Help with excretion of nitrogenous wastes
9. Chemical substances that help insects communicate.
10. Help with swimming and assist in reproduction
Male – first pair in the shape of a V, also
larger than female’s.
11. Sense the environment
12. A. Chelicerata
B. Crustacea
C. Insecta
D. Chelicerata
E. Myriapoda
F. Crustacea
G. Insecta
H. Crustacea
I. Crustacea
J. Chelicerata
K. Chelicerata
13. Incomplete – the organism look like immature
adults when they hatch – for example grasshoppers
Complete – the organism does not look like the adult
form at all when they hatch. They go through different
forms in their development – for example butterfly.
Ex. Crabs, Barnacles,
14. Tongue worms, crayfish
• 2 Pairs of
• Mandibles
• Use gills or
Spiracles for
•Mostly aquatic,
some are
•Body divided
And Abdomen
of chitin
• Some species
are parasitic
•No antennae
• No mandibles
Mouth parts
Are fang like
• Use book lungs
for breathing.
•Mainly terrestrial
Ex. Spiders,
Scorpions, horseshoe
15.Help with pollination – crops would not grow w/o
Pollination. Lady bugs eat aphids that destroy crops
In Asia and other countries insects are a delicacy.
16. Vectors of diseases like West Nile, Malaria,
Dengue fever (mosquitoes), Destroy crops (Locusts)
17. By doing dances –
Waggle dance – food is farther away from the hive
Round dance – food is fairly close to the hive.
Also use pheromones – chemical substances.
18. Vector
19. Mandible
20. Tracheal tubes
21. Chitin
22. Pheromones
23. Decapods
24. Castes

Slide 1 - Effingham County Schools