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==Structure and Function==
==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==
==Life cycles==