Chapter 13 Arthropoda Flashcards
exoskeleton
Arthropods have an __________, called the cuticle, that is highly protective without sacrificing mobility. The cuticle is an outer covering secreted by underlying epidermis.
chitin
is a tough, resistant, nitrogenous polysac- charide that is insoluble in water, alkalies, and weak acids
ecdysis
Molting necessary for an arthropod to increase in size, since exoskeleton does not grow.
The process of molting ends in the shedding of skin, called _______
molting
Shedding of the outer cuticular layer
jointed appendages
Arrangement is often modified, with both segments and appendages specialized for a range of functions
Each section of an appendage functions as a hollow tube moved by muscles, which insert on the inside
spiracle
Air enters the spiracle allowing oxygen to travel along a network of tubes called trachea to reach the cells in the insects body
tracheal tubes
A network of thin-walled tubes that branch throughout the entire body of terrestrial insects; used for respiration.
gills
one of the external filaments or leaflike plates connected with the tracheae of the inside of the body that form part of the respiratory system of some aquatic insect larvae and nymphs but rarely persist in the adult.
insect wings
Insects differ from other arthropods in having three pairs of legs and usually two pairs of ______ on the thoracic region of the body
tagmata
Head, thorax, and abdomen
Subphylum Hexapoda
holometabolous metamorphosis
(complete) which separates the physiological processes ofgrowth (larva) from those of differentiation (pupa) and reproduction (adult)
hemimetabolous
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What are the advantages to having jointed legs?
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How did the Arthropod exoskeleton help them become so successful? What are the disadvantages of having an exoskeleton?
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Review key characteristics of the different groups we discussed in class.
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