So here we are on the creepy
crawly page, or least one of them,doesn't it want to make
you scratch and itch and yuuuukkk.!! You can either click
on the links above or read a bit about insect biology first...the
choice is yours. Don't worry the insect biology we cover
is only basic, so have a good look at the picture below which
has the most relevant labels that the average person needs
to know..
In the case of the cockroach, the pro thorax, which is directly
behind the head, is sort of extended and flattened forward and
thus covers the head like a cap, this is know as the pronotum.
Also makes for abetter crunchchchch.. There is also a term called
metamorphosis, this is what will happen to me when I win the
lottery, seriously, this is how an insect develops.
There are three types:-
Complete (holometabolous) Metamorphosis,
this has the four stages of egg, larva, pupa and the adult.
Incomplete (hemimetabolous)Metamorphosis, this has three
stages, egg, nymph (this casts it's skin several times and
changes occur) and adult. Ametabolous Metamorphosis, hardly
any change except for size between the nymph and the adult.
Click
here to continue 
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