4. The physical breakdown or digestion of food into smaller pieces by chewing, grinding, and churning 6. Tiny hair-like structures on the surface of villi that further increase the surface area available for nutrient absorption 7. The digestion process of breaking down food into simpler chemical compounds through enzymatic reactions 8. An enzyme that breaks down proteins into amino acids) 9. A rounded mass of food that has been chewed and mixed with saliva in the mouth, ready to be swallowed.
Answer (1)
4. Mechanical Digestion 6. Microvilli 7. Chemical Digestion 8. Protease 9. Bolus
