Which component of saliva destroys harmful bacteria?

Which is the characteristic lining of the stomach of mammals?

Bilirubin and biliverdin are present in . . . . . . .

If the pancreas is removed,the compound which remains undigested is

Correct the statement given below by choosing the right option shown in the bracket:
Renin is a proteolytic enzyme found in gastric juice in (infants/adults).

The cells of the pancreas are not digested by their own enzymes because...