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18 Cards in this Set

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Describe the pathway taken by the blood as it circulates through an arthropod's body.
Blood is pumped by the heart through vessels. The blood flows out of the vessels, bathes the tissues of the body, and returns to the heart through open body spaces rather than through blood vessels
Describe two features that are unique to arthropods.
jointed appendages, segmented bodies, exoskeletons
What are the advantages and disadvantages of an exoskeleton?
An exoskeleton is advantageous because it protects against water loss and injury. Disadvantages include its weight and inflexibility
How are compound eyes an adaptation to the way of life of some arthropods?
Compound eyes can detect the movements of prey, mates, or predators. The total image formed is made up of thousands of parts
What characteristics of arthropods might explain why they are the most successful animals in terms of population sizes and numbers of species?
jointed appendages, exoskeletons, efficient gas exchange, wings in some, acute senses.
Compare the adaptations for gas exchange in aquatic and land arthropods.
Aquatic arthropods exchange gases through gills, which extract O2 from water and release CO2 into the water. Land arthropods have either tracheal tubes or book lungs. Tracheal tubes carry air throughout the body. Book lungs are chambers with leaflike plates for gas exchange.
any structure, such as a leg or an antenna, that grows out of an animal's body
appendage
in arthropods, the periodic shedding of an old exoskelet
molting
structure in some arthropods formed by the fusion of the head and thorax.
cephlathorax
hollow passages in some arthropods that transport air throughout the body.
tracheal tubes
in arthropods, openings on the thorax and abdomen through which air enters and leaves the tracheal tubes.
spiracles
gas exchange system found in some arthropods where air-filled chambers have plates of folded membranes that increase the surface area of tissue exposed to the air.
book lungs
chemical signals given off by animals that signal animals to engage in specific behaviors.
pheremones
visual structure in arthropods that uses one lens to detect light and focus.
simple eye
in arthropods, a visual system composed of multiple lenses; each lens registers light from a small portion of the field of view, creating an image composed of thousands of parts.
compound eye
in most arthropods, mouthparts adapted for holding, chewing, sucking, or biting various foods.
mandibles
in arthropods, tubules located in the abdomen that are attached to and empty waste into the intestine.
Malpighian tubules
type of asexual reproduction in which a new individual develops from an unfertilized egg.
parthenogenesis