Explain the role played by different digestive juices in digestion and organ which secret them
Answers
Salivary Glands
The main salivary glands are found in the cheeks, under the tongue and around the jaw. They secrete about 1 quart of saliva each day.
Stomach
The stomach, an important organ for digestion, produces gastric juice which is comprised of hydrochloric acid, water and enzymes.
Pancreas
The pancreas is a leaf-shaped organ that lies below the stomach. It secretes juices rich in enzymes capable of digesting the 3 main energy nutrients -- carbohydrates, fats and proteins
Liver
The liver produces a greenish juice called bile, which is stored and concentrated by the gall bladder. After a high-fat meal, such as one containing cheese, cream or bacon, the fats from the food tend to stick together to form large fat spheres. These are too big for the enzymes to work on, so the fat can be absorbed by the body.
Intestines
While the digestive process begins in the mouth and stomach, digestion gains momentum when food enters the small intestines. This is where secretions from the pancreas, liver and small intestines do most of the digestive work. The lining of the small intestine is covered with tiny finger-like extensions called villi -- which is where nutrients get absorbed into the blood. The tips of villi have many enzymes that digest protein, carbohydrates and fat, such as peptidases, disaccharidases and intestinal lipases.