Final Answer:
The granules of pancreatic serous acini contain digestive enzymes, such as amylase, lipase, and proteases.
Step-by-step explanation:
Pancreatic serous acini are specialized cells in the pancreas responsible for secreting digestive enzymes. These enzymes are stored in zymogen granules within the acinar cells. The granules contain a mixture of digestive enzymes, including amylase, which breaks down carbohydrates; lipase, responsible for fat digestion; and various proteases, such as trypsin and chymotrypsin, which aid in protein digestion. Upon stimulation, these enzymes are released into the pancreatic ducts, eventually reaching the small intestine to assist in the breakdown of ingested food. This process is crucial for the digestion and absorption of nutrients in the digestive system.