Chymotrypsinogen is produced by the .......

Which vitamin induces the maturation of $R.B.C.s$?

Succus entericus is secreted by

Select the correct option:
$(1)$ The enzyme in saliva that breaks down starch is Ptyalin / Steapsin.
$(2)$ The Oxyntic cells / Peptic cells of the gastric glands secrete $HCl$.

Correct the statement given below by choosing the right option shown in the bracket against it:
Pancreatic juice and bile are released through (intestine/hepato-pancreatic duct).

From the point of ontogeny,the liver is