The body is divisible into head and trunk in
The body of Bufo (common toad) is divisible into a head and a trunk; the neck is absent.
The body of Pila (Mollusca) is divisible into a head, foot and visceral hump.
The body of Balanoglossus (Hemichordata) is divisible into a proboscis, collar and trunk.
The body of Taenia (tapeworm) is divisible into scolex, neck and strobila.