Digestion and Nutrition

1. The pouchlike muscular organ that secretes acids and digestive enzymes is the _________stomachesophagusintestines.

2. _________salivaenzymeschime is the watery material that results form digestion in the stomach.

3. Iron, potassium, and iodine are _________vitaminsmineralsamino acids.

4. The human body is about 60 percent _________saltwaternutrients.

5. The teeth break down food by _________chemical digestionmechanical digestion.

6. _________TeethYour tongueSaliva in the mouth helps to chemically digest food.

7. _________Mechanical digestionChemical digestion takes place in the mouth, stomach, and small intestine with the help of chemicals called _________amino acidsvitaminsenzymes.

8. Proteins are made up of smaller building blocks called _________mineralsvitaminsamino acids.

9. The muscle contractions that move food through the digestive tract are called _________flexingperistalsisnutrients.

10. _________FlagellaVilliStarches are tiny, fingerlike projections that cover the folds of the small intestine.

11. Chemical digestion is possible because of certain kinds of proteins called _________amino acidscarbohydratesenzymes.

12. There are six kinds of _________mineralsnutrientsvitamins available in food.

13. Three types of _________mineralsnutrientscarbohydrates are sugar, starch, and fiber.