Various secretions of the digestive system--most notably the enzymes--provide the spark that breaks down our foods into compounds that the body can use.
(Various secretions of the digestive system; provide; the spark that breaks down our foods into compounds) (the spark; breaks down; our foods; into compounds) (compounds; can use; the body)
Various secretions of the digestive system the spark compounds
provide breaks down can use
the spark that breaks down our foods into compounds
our foods into compounds
the body