Changes

===Insect Body===

===Insect Body===

 

Insect's bodies are covered by an exoskeleton. This exoskeleton provides support and protection to the underlying living tissues. It is 'acellular' so is secreted by underlying epidermis.

*Covered by an exoskeleton  

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.

**Provides support and protection to the living tissues

An insect's body is '''metameric''' (divided into segments). The segments include; head, body and abdomen. The segments are linked by articular membranes, allowing movement.

**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

**Articular membranes link segments allowing movement

===Insect Head===

===Insect Head===