Meaning, The Messiah (PNUH) is one of the human Messengers of Allah (swt), who acted according to the commands and the legislation, that Allah (swt) sent to them.

(… وَأُمُّهُ صِدِّيقَةٌ …) (…And his mother was a supporter of truth …): Hence, Maryam the Chaste believed in Allah (swt) with complete trust in Him, so she was given the highest rank after the prophecy. This adjective is the best proof that she was not a woman Prophet, this rank gave her a great virtue and honour, moreover there is a whole Surah by her name (Surah Maryam).

(… كَانَا يَأْكُلَانِ الطَّعَامَ …) (…They both used to eat food …): The is a very clear evidence that they are humans since they need food same as all people.