:-the nutrients in food we eat are mostly made of large and complex molecules,such as fat,protein and starch,and they are too big to diffuse in to our blood so besides the chewing of food to break it down, there are digestive enzymes that break down these nutrients such as e.g amylase(to break down starch),protease(to break down proteins,lipase(to break down fats). I'll talk about the other learning targets later.
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