The enzyme $Trypsinogen$ is a component of:

Give scientific reasons:
$(1)$ The pancreas is an exocrine as well as an endocrine gland.
$(2)$ The liver,although not taking part in the process of digestion directly,is an important accessory digestive gland.

Which is the characteristic lining of the stomach of mammals?

What are the three major types of cells found in the gastric gland? Name their secretions.

What are the functions of goblet cells?

Which cells of the gastric mucosa secrete pepsinogen?