PHYLUM ARTHROPODA

largest phylum in the animal world; dominate the animal kingdom with an estimated 85 percent of known species included in this phylum; principal characteristics of all the animals in this phylum are functional segmentation of the body and presence of jointed appendages

protein support for the body; made principally of chitin, which is a waterproof, tough polysaccharide

true body cavity

the covering of an arthropod

which is a thin, waxy water resistant outer layer containing no chitin

which is a thin, waxy water resistant outer layer containing no chitin

“to strip off”; this is a cumbersome method of growth, and during this time, the animal is vulnerable to predation.

presence of six legs (three pairs) in these animals as differentiated from the number of pairs present in other arthropods.

distinct region typically comprising several adjoining segments

bears one pair of sensory antennae, mandibles as mouthparts, a pair of compound eyes, and some ocelli

simple eyes

bears three pairs of legs (one pair per segment) and two pairs of wings

bears three pairs of legs (one pair per segment) and two pairs of wings

usually has eleven segments and bears reproductive apertures

respiratory opening or holes

includes arthropods with numerous legs (number of legs may vary from 10 to 750); All myriapods are terrestrial animals and prefer a humid environment

animals that bear one pair of legs per segment, mandibles as mouthparts, and are some what dorsoventrally flattened

bear two pairs of legs per diplosegment, a feature that results from embryonic fusion of adjacent pairs of body segments

most dominant aquatic arthropods; possess two pairs of antennae, mandibles as mouthparts, and biramous appendages

this means that their legs are formed in two parts

the head and thorax of most crustaceans is fused to form a __________

cephalothorax is covered by a plate called the __________

blood cavity

the respiratory pigments present in these crustaceans