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.