Difference between revisions of "Insecta"

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==Structure and Function==
 
==Structure and Function==
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===Insect Body===
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*Covered by an exoskeleton secreted by underlying epidermis
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*Divided into head, body and abdomen
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===Insect Head===
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*Capsule of fused plates at the anterior end of the body
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*One large pair of compound eyes
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**Honeycomb like corneal facets
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*Three simple ocelli
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**Dorsal to compound eyes
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*One pair of antennae
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====Antennae====
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*Form varies amongst insecta
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**E.g. long and segmented, short and squat etc.
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*Hairs sometimes present
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*Aristae (bristles) sometimes present
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====Mouthparts====
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*Modification depending on feeding method
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*Insects which suck up liquified food have an expanded sponge like labellae
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**Cannot penetrate skin
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**Palps
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*Insects which suck blood have long slender mouthparts for piercing skin
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**Hypopharynx
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**Mandibles
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**Labrum
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**Maxillae
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*Larval mouthparts are prominent
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**One pair of hooks
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**Cephalo-pharyngeal skeleton
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**Mouthparts help identify larvae
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===Insect Thorax===
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====Leg====
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====Wing====
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===Insect Abdomen===
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====Respiratory System====
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====Spiracles====
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====Alimentary and Excretary System====
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====Nervous System====
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====Fat Body====
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====Reproductive System====
  
 
==Life cycles==
 
==Life cycles==

Revision as of 18:16, 24 October 2008


 This article is still under construction.


Infectious agents and parasitesWikiBugs Banner.png
PARASITES
ARTHROPODS



Classification

Arthropod Classification - copyright nabrown RVC

The phylum arthropoda is divided into several subphylums including Chelicerata (which includes the arachnids), Myriapoda, Hexapoda (which includes the insecta), Crustacea and Trilobitomorpha. These are then divided into many classes. The two of major veterinary importance are the insecta and arachnida classes.

Structure and Function

Insect Body

  • Covered by an exoskeleton secreted by underlying epidermis
  • Divided into head, body and abdomen

Insect Head

  • Capsule of fused plates at the anterior end of the body
  • One large pair of compound eyes
    • Honeycomb like corneal facets
  • Three simple ocelli
    • Dorsal to compound eyes
  • One pair of antennae

Antennae

  • Form varies amongst insecta
    • E.g. long and segmented, short and squat etc.
  • Hairs sometimes present
  • Aristae (bristles) sometimes present

Mouthparts

  • Modification depending on feeding method
  • Insects which suck up liquified food have an expanded sponge like labellae
    • Cannot penetrate skin
    • Palps
  • Insects which suck blood have long slender mouthparts for piercing skin
    • Hypopharynx
    • Mandibles
    • Labrum
    • Maxillae
  • Larval mouthparts are prominent
    • One pair of hooks
    • Cephalo-pharyngeal skeleton
    • Mouthparts help identify larvae

Insect Thorax

Leg

Wing

Insect Abdomen

Respiratory System

Spiracles

Alimentary and Excretary System

Nervous System

Fat Body

Reproductive System

Life cycles

Fleas

Lice

Nuisance flies

Biting Flies

Myiasis Flies



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