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Arthropod
Arthropod means (1)_____________ appendages.
All arthropods have a hard exoskeleton which is usually composed of substance called
(2)_____________, go through periodic (3)_____________ as they shed or molt their exoskeleton,
have (4)_____________ body segments (head, thorax, cephalothorax, and abdomen), jointed
(5)_____________, and an (6)_____________ circulatory system.
Ecdysis is (7)_____________, to replace old exoskeleton.
The (8)_____________ of arthropods is composed of chitin.
An open circulatory system is one in which blood is pumped out of the (9)_____________ into the
body.
Arthropods are divided on the type of (10)_____________ they have.
Terrestrial arthropods like insects, centipedes, and millipedes breathe through hollow air tubes called
(11)_____________.
Aquatic chelicerates like the (12)_____________ crab have (13)_____________ to breathe;
spiders, ticks, and scorpions use (14)_____________ to get air.
Crustaceans breathe through (15)_____________.
Arthropods have a nervous system with an anterior (16)_____________ and sensory organs that
include compound eyes or simple eyes called (17)_____________; (18)_____________ membranes
for hearing; and (19)_____________ for smelling, feeling, or tasting.
(20)_____________ tubules filter wastes in arthropods.
The subphylum Chelicerarta contains the class (21)_____________ with the horseshoe Crab and the
class (22)_____________ with spiders, ticks, scorpions, and mites. Both classes have
(23)_____________ body regions, the (24)_____________ and abdomen, no (25)_____________,
eight pairs of legs, and (26)_____________ or fangs.
Appendages on the head of chelicerates called (27)_____________ are used for sensing the
environment and getting food into the mouth.
Spiders have posterior glands called (28)_____________ that help make their silken webs to get
prey. Spiders detect movement whenever their prey gets caught in their (29)_____________ and
by sensory (30)_____________ on their body. Spiders produce (31)_____________ to kill their
prey and are beneficial because they feed mainly on (32)_____________.
Spiders are unlike insects in that they have (33)_____________ not six legs, only simple
(34)_____________ and not compound, and (35)_____________ body regions and not three.
The body regions of spiders are the cephalothorax and (36)_____________.
The body regions of insects are the head, (37)_____________, and abdomen.
The (38)_____________ recluse and black (39)_____________ are two poisonous spiders in our
area.
The class Crustacea is in the subphylum (40)_____________ and includes crabs, shrimp,
(41)_____________, crayfish, barnicles, and the terrestrial pillbugs and (42)_____________.
Crustaceans have a pair of sensory antenna and a pair of shorter (43)_____________ for balance.
The head also contains three types of mouthparts - (44)_____________, maxilla, and maxillipeds.
They also have pincers called (45)_____________ to help catch and eat food.
Aquatic crustaceans have an external shell or (46)_____________ that must be molted, and they
are used by man for food.
The class (47)_____________ contains predators called centipedes with fangs,
(48)_____________ glands, posterior (49)_____________, and (50)_____________ pair of legs
per body segment.
The class (51)_____________ contains millipedes which are (52)_____________ with
(53)_____________ pairs of legs per body segment.
abdomen antenna antenna antennules appendages appendages arachnida blood
vessels book gills book lungs brain brown carapace cephalothorax chelicera
chelipeds chilopoda chitin diploda ecdysis eight exoskeleton eyes gills hairs
horseshoe insects jointed lobster Malpighian mandibles mandibulata molting ocelli
one open pedipalps pincer poison sowbugs specialized spinnerets thorax trachae
two
two
two
tympanic
vegetarian
venom
web
widow
xiphosura