animal biology human biology parts ii amp iii of first course in biology biology 130 animal biology exists as there is only one vertebra in front of the shoul ders fig 252 while mammals have seven neck cervical vertebrae there are no tail caudal vertebrae even in the tadpole state of frogs and toads the head appears triangular in shape when viewed from what direction the head of a frog is more pointed than the head of a toad is the skull a closed case of broad bones or an open structure of narrow bones fig 252 describe the mouth observe the extent of the mouth op rn54nx.jpg from añimal sex human View Photo