I would say Australopithecus because so far, its skull is the one that resembles the most that of a human's.
In baby food protease brakes down the proteins and is used to pre-digest proteins during the manufacture of baby foods.
I learnt this last week!
Hope this helps! :)
All I know is that they:
Trigger blood clotting
Made in the bone marrow
they are the least common blood cell
Idk about the other ones though
