Pancreas
chyme
pancreatic juice chyme bile
The pancreas is the oval organ that sends fluids, such as enzymes and bicarbonate, into the small intestine to aid in the chemical digestion and neutralization of chyme.
Alkaline pancreatic juices are secreted into the small intestine and neutralize the acidic chyme.
carbohydrates, protein, and fat in the chyme.
From this point, the chyme remains at a neutral or slightly alkaline pH.
The mixture of food and digestive juices that leave the stomach is called chyme. Chyme is a semi-fluid mass consisting of partially digested food, gastric juices, and enzymes that is passed from the stomach to the small intestine for further digestion and absorption of nutrients.
The structures that add enzymes to chyme in the small intestine are the pancreas and the intestinal mucosa. The pancreas secretes pancreatic enzymes such as proteases, lipases, and amylases into the small intestine to aid in digestion. Additionally, the intestinal mucosa produces enzymes to further break down nutrients for absorption.
Bicarbonate is the secretion that neutralizes stomach acid as chyme enters the small intestine. Bicarbonate is necessary because chyme is highly acidic. Bicarbonate is created in the pancreas.
The nutrients in the chyme would not be absorbed by the villi and your body would not get the nutrients.
Fats in chyme stimulate the secretion of bile from the gallbladder and enzymes from the pancreas to help with fat digestion and absorption in the small intestine.