Why does a mask have to cover both your nose and mouth to be effective explain using the Respiratory tract

Match the following. 1. used by the body to synthesize vitamin d saturated cholesterol fats that can increase the amount of "bad" cholesterol in the blood nutrient that vitamins a, d, e, and k are dependent upon for their absorption by cells one factor that can be changed in order to lower your body fat catabolism exercise 5. body type that is tall and thin mesomorph 6. body type that is normal height and well-built grain 7. good source of carbohydrates and vitamin b complex ectomorph 8. the body type that is short and overweight endomorph 9. the conversion of nutrients into energy fat