tip: apex of tongue, most anterior part blade: lies right in back of the alveolar ridge dorsum (body): main mass of tongue in front of the root root: most dorsal part of tongue.
Bring milk, water and celery root to a simmer in a large saucepan over medium heat. Reduce the heat to maintain a gentle simmer and cook until very tender, about 30 minutes. Reserve 1 cup of the cooking liquid, then drain. Puree the celery root, butter, salt and pepper in a food processor (or blender) until smooth and the consistency of thinned mashed potatoes.
To thicken puree, add CEREAL. To thin puree, add BREAST MILK / formula milk / water. Steam first then blend, instead of blend first then steam. Cook the food, let it cool a bit, toss it into a blender or food processor and puree away.