When food is put into the mouth, saliva is secreted to begin the very first process of digesting food.
(food; is put; into the mouth) (saliva; is secreted; T:When food is put into the mouth) (saliva; to begin; the very first process of digesting food)
food saliva saliva
is put is secreted to begin
into the mouth
T:When food is put into the mouth
the very first process of digesting food