6,273
edits
Changes
Jump to navigation
Jump to search
Insect Structure and Function (view source)
Revision as of 13:26, 21 July 2010
, 13:26, 21 July 2010→Insect Head
==Insect Head==
==Insect Head==
[[Image:Blow_fly_head.jpg|thumb|right|150px|''Blow Fly Head'' <br> Martin Pot 2008, WikiMedia Commons]]
[[Image:Blow_fly_head.jpg|thumb|right|150px|''Blow Fly Head'' <br> Martin Pot 2008, WikiMedia Commons]]
[[Image:Insect Eyes.jpg|thumb|right|150px|Alan Hadley]]
[[Image:Insect Eyes.jpg|thumb|right|150px|''Illustration of Mouthparts'' <br> Heds 2007, WikiMedia Commons]]
[[Image:Blow fly head.jpg|thumb|right|150px|Blowfly Head Close Up - Martin Pot - Wikimedia Commons]]
[[Image:Blow fly head.jpg|thumb|right|150px|Blowfly Head Close Up - Martin Pot - Wikimedia Commons]]
An insect's head is composed of a capsule of fused plates at the anterior end of the body. They have one large pair of compound eyes and honeycomb like corneal facets. In contrast to this, are the three simple ocelli, found dorsal to compound eyes.
An insect's head is composed of a capsule of fused plates at the anterior end of the body. They have one large pair of compound eyes and honeycomb like corneal facets. In contrast to this, are the three simple ocelli, found dorsal to compound eyes.
Insects that suck up liquified food, have an expanded sponge-like labellae. They cannot penetrate skin. They also have palps present which are sensory structures.
Insects that suck up liquified food, have an expanded sponge-like labellae. They cannot penetrate skin. They also have palps present which are sensory structures.
Insects that suck blood, have long slender mouthparts for piercing skin. Mouthparts include:
Insects that suck blood, have long slender mouthparts for piercing skin. Mouthparts include:
**Hypopharynx- The bottom part of the pharynx.
**Hypopharynx- (hp)The bottom part of the pharynx.
**Mandibles- Appendages near the insect's mouth.
**Mandibles- (md) Appendages near the insect's mouth.
**Labrum- A lobe-like structure acting like an upper lip.
**Labrum- (lb) A lobe-like structure acting like an upper lip.
**Maxillae- Modified limbs that work as a pair of accessory jaws.
**Maxillae- (mx) Modified limbs that work as a pair of accessory jaws.
Larval mouthparts are prominent. They contain One pair of hooks, a Cephalo-pharyngeal skeleton
Larval mouthparts are prominent. They contain One pair of hooks, a Cephalo-pharyngeal skeleton