Why is it better to get calories from nutrient-dense foods rather than from foods that lack nutrition? Diagram the passage of food through the digestive system. Label the organs involved in digestion and absorption and identify the sites where carbohydrates, proteins, and fats are digested. For each of the following foods, choose the one that’s more nutrient-dense. a. Low-fat popcorn or buttered crackers b. Macaroni and cheese or plain pasta c. Celery sticks or fresh fruit salad d. A slice of cheese pizza or a double cheeseburger e. Oatmeal with banana and raisins or cornflakes with milk Calculate the number of calories in each of the following foods. a. A slice of whole-wheat bread with 8 grams of carbohydrates b. 2 ounces of cheddar cheese with 6 grams of fat c. A serving of grilled chicken with 10 grams of protein