a . the production of bile
b . the production of digestive enzymes
c . the production of blood proteins
d . the removal of blood toxins
e . the storage of iron and certain vitamins
Feedback
Question 3
Food is prevented from entering the trachea by the
Select one :
a . pharynx .
b . larynx .
c . epiglottis .
d . glottis .
e . sphincter muscle .
Feedback
Question 4