What do you mean by 'major' and by 'parts'?
by major are you referring to size, importance to the survival of the animal or most consumed parts?
yes,they have two main body parts
A spider's body is typically divided into two main parts: the cephalothorax (which contains the head and thorax) and the abdomen.
yes
The two main parts are the Head and Body.
yes
No. Spiders (including Tarantulas) have two main body parts -- the cephalothorax and the abdomen -- and eights legs. It is insects have three main body parts, as well as six legs.
A Black Widow spider has two main body parts: the cephalothorax (head and thorax combined) and the abdomen.
the parecula has 4 body parts 3 fins and the main body
There are three main body parts on a moth. The head, body and wings.
The two coordination systems of the body are the nervous systems and the endocrine sytems, which enable all parts of the body to work together as one.
Human body has two kidneys
I think this word is bifurcation .Bifurcation means the splitting of a main body into two parts.