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28 Cards in this Set
- Front
- Back
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[arthropoda] the most primitive arthropods resemble the _____ in that body is made up of a series of segments that are similar in appearance.
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earthworm
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In some antropods, several segments have fused togehter to form a single segment with a specialized function. This fusion is know as _____
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tagmatization
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all anthropods are _____ symmetric
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bilateral
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does anthropods illustrate any cephalization?
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yes.
*its part of the nervous system and sense organ |
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two prominent arthropod features are the
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chitinous exoskeleton and jointed appendages
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what is the exoskeleton layer and what is its function?
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layer of rigid material secreted by the underlying epidermis
**its functions is for protection and mechanical support of internal body structures |
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the exoskeleton is composed of
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chitin (a polysaccharide), some protein and occasionally calcium salts
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exoskeleton, besides protection it also allows
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attachment of muscles and allows segments to interact.
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what are the major classes/groups in the phylum arthropoda?
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Trilobitomorpha
Chelicerata Mandibulata Crustacea Tracheata Myriapoda Hexapoda |
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which anthropoda are the most primitive group
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Trilobites
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the class chelicerata have specialized mouthparts called ____
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chelicerae
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name the structures found in Chelicerata
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*a distinct cephalothorax
*abdomen *four parts of legs *lack antennae |
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[Insecta life cycle]
There are two basic development life cycles of insects they are: |
1. Hemimetabolous
2. Holometabolous |
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During hemimetabolous metamorphosis (or direct meatmorphosis) what happen? define terms
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*the egg hatches into a larva, which bears no resemblances to the adult organism.
ex: butterfly (3 stages) 1. larva 2. sessile stage called a pupa (a cocoon) 3. adult form (butterfly) |
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what is hemimetabolous?
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**the animal molt instead
** Incomplete (or simple) Metamorphosis (hemimetabolous). In these insects, the nymph more or less resembles the adult and there is no pupal stage. The example shown below is a plant bug. Some other insects with incomplete metamorphosis are: crickets, true bugs, termites, grasshoppers, and cockroaches. |
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[Cochroach circulatory system] the cockroach has an open or close circulatory system
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open
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the ______ is the primary circulatory vessel and it carries the fluid plasma containing _______ anteriorly to the head
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dorsal vessel
amoebocytes (hemolymph) **analogous to blood in a closed vascular system |
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the hemolymph flows ___posteriorly or anteriorly___ to the head.
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posteriorly
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the Hemolymph then flows into cavities surrounding the _____
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internal organs
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The hemolymph flowws posteriorly where it is picked up by the _____
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dorsal vessel.
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do cockroach have a respiratory pigment
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no
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[Respiratory System in insect] what is the function of the respiratory system?
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**Carry oxygen in the insects
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[respiratory system] air enters the lateral ______ and travels through a network of tubules called _____.
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spiracles
trachea |
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[digestive system] identify the sturctures in the forgut
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mouth, esophagus, crop, and gizzard
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The midguts incldes the
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digestive caeca and extends to the Malpihian tubules
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Most of the digestion occurs in the _____ due to the release of digestive enzymes by the _____
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midgut
digestive caeca |
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[excretory system]
what is the function of Malpighian tubules |
they remove and excrete nitrogenous waste from the hemolymp.
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Interstitial fluid enters at the _____ and travel along the ____. Waste empty into the lumen of the hingut and are excreated out.
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closed distal ends (in the coelom
tubules |
