Arthropods Flashcards
What does arthropoda mean
joined legs
how many germ layers do arthropods have?
3
Describe body symmetry of arthropods
bilateral
Are arthropods segmented?
yes
Arthropods have jointed ________ for movement
appendages
What are the 3 basic segments?
head, thorax, abdomen
What is a cephalothorax?
fused head and thorax
Describe the coelom of arthropods
true coelom
Describe the nervous system of arthropods
cephilization present; sharp senses: antennae, use of pheromones
Describe the skeleton of arthropods
exoskeleton
How many body openings do arthropods have
2
What are mandibles?
jaws
Describe the circulation of arthropods
open; 1 or more hearts
What do crustaceans use for respiration?
gills
What do arachnids use for respiration?
book lungs
What do insects use for respiration?
tracheal tubes-holes-spiracles
Are arthropods sexual or asexual?
sexual
Is fertilization internal or external on land?
internal
Is fertilization internal or external in water?
external
Describe sexes in arthropods
most have separate sexes, but some are hermaphrodites
What is parthenogenesis?
development from unfertilized eggs
What do crustaceans use for respiration?
gills
How many body sections do crustaceans have?
2: cephalothorax & abdomen
What are the sexes in crustaceans?
separate sexes
What are the only type of terrestrial crustacean?
pill bugs (roly polys)
What are chelipeds in crustaceans?
pincers; 1 pair
What are swimmerets in crustaceans?
underside of tail used for swimming & reproduction; 5 pairs
How many body segments to arachnids have?
two
How many pairs of appendages do arachnids have?
6
What is the chelicerae in arachnids
modified pincers or fangs; 1 pair
What are pedipalps for in arachnids
handling food and sensing; 1 pair
Describe respiration in spiders
they have book lungs
Do spiders have mandibles?
no
Do spiders have antennae?
no
What is someone who studies insects
a weirdo (entomologist)
How many body regions do insects have?
3
How many pairs of legs to insects have?
6
How many sets of wings do insects have?
2
Do insects have antennae?
yes
Describe seeing in insects
1+ pairs of compounds eyes and 3 simple eyes
What are sensory hairs in insects?
cover antennaw and exoskeleton
How do insects respire?
through tracheal tubes & spiracles
How do insects hear?
through tympanum
