The structure (s) that present in man but absent in frog is (are)

In man, the salivary glands, pollex and penis are present. All the three structures are absent in frog. Digestion starts from stomach in frog due to lack of salivary glands in the bucco-pharyngeal cavity. Forelimb of frog has only four digits owing to the lack of pollex. As there is no copulatory organ like penis in frog, it shows external fertilisation.