3,326
edits
Changes
Jump to navigation
Jump to search
no edit summary
===Insect Body===
===Insect Body===
*Covered by an exoskeleton secreted by underlying epidermis
*Covered by an exoskeleton
**Provides support and protection to the living tissues
**Acellular so is secreted by underlying epidermis
**The outer layer is called the '''epicuticle''' which is composed of proteins and covered by a waxy layer
**The inner layers are the '''endocuticle''' and '''exocuticle''' which are composed of protein and chitin
*Body is '''metameric''' (divided into segments)
*Divided into head, body and abdomen
*Divided into head, body and abdomen
**Articular membranes link segments allowing movement
===Insect Head===
===Insect Head===
*Claw
*Claw
*Usually six-segmented
====Wing====
====Wing====
**Muscular control so can open and close at will
**Muscular control so can open and close at will
**Mounted on stigmatic plates
**Mounted on stigmatic plates
**Lead to trachea
*Muscular contactions of the body wall produce respiratory movements
*Muscular contactions of the body wall produce respiratory movements
====Alimentary and Excretary System====
====Alimentary and Excretary System====
*The precise shape of the gut varies between [[Arthropods - WikiBugs|arthropods]]
*Alimentary canal divided into fore, mid and hind gut
*Alimentary canal divided into fore, mid and hind gut
**General body cavity
**General body cavity
**Equivalent to the capillary circulation in mammals
**Equivalent to the capillary circulation in mammals
**Contains haemolymph
*Ostia (openings) in the [[Vascular System - Anatomy & Physiology|blood vessel]] walls allow return of blood to the heart
*Ostia (openings) in the [[Vascular System - Anatomy & Physiology|blood vessel]] walls allow return of blood to the heart
*Chain of fused ganglia running along the floor of the abdomen and thorax
*Chain of fused ganglia running along the floor of the abdomen and thorax
**Nerves are given off from chain
**Nerves are given off from chain
*Complex nervous system
**Well developed visual senses
====Fat Body====
====Fat Body====