Ptyalin is an enzyme of ...... .

Crypts of Lieberkühn are present between the bases of villi and they secrete ...

Hepatic sinusoids are the branches of

Which of the following gastric cells indirectly help in erythropoiesis?

$A$: In humans,the duct of Wirsung from the pancreas combines with the bile duct before opening into the duodenum.
$R$: Blockage in the duct of Wirsung will prevent the endocrine function of the pancreas.

Write a note on the liver,gall bladder,and pancreas.