Introduction:
Digestion is a process by which the food that we eat is broken down into simpler substances that our body can easily absorb and use for various metabolic functions.

Organs of Digestive System:
The human digestive system is a long and complex system that comprises of several organs. The major organs of the digestive system are as follows:

1. Mouth: The process of digestion begins in the mouth. The teeth and tongue help to break down the food into smaller pieces, while the saliva secreted by the salivary glands helps to moisten the food and initiate the process of digestion.

2. Esophagus: The esophagus is a muscular tube that connects the mouth to the stomach. It helps to transport the food from the mouth to the stomach.

3. Stomach: The stomach is a muscular sac that helps to mix the food with gastric juices secreted by the stomach lining. These juices help to break down the food into smaller particles.

4. Small intestine: The small intestine is a long and narrow tube that is responsible for the absorption of nutrients from the food. The food is further broken down into simpler substances by enzymes secreted by the pancreas and the liver.

5. Large intestine: The large intestine is responsible for the absorption of water and electrolytes from the undigested food. It also helps to eliminate the waste material from the body.

Associated Glands:
There are several glands associated with the digestive system that secrete digestive juices and enzymes. The major glands are as follows:

1. Salivary Glands: These glands secrete saliva that helps to moisten the food and initiate the process of digestion.

2. Pancreas: The pancreas secretes enzymes that help to break down carbohydrates, proteins, and fats.

3. Liver: The liver secretes bile that helps to digest fats.

4. Gallbladder: The gallbladder stores and releases bile into the small intestine.

Conclusion:
Thus, the human digestive system is a complex system that involves several organs and glands. The process of digestion is essential for the absorption of nutrients and elimination of waste material from the body.

The process of converting complex substances into simple substances is called digestion.
Digestive system = Alimentary canal + glands.

1.Buccal cavity
2.Oesophagus
3.Stomach
4.small intestine
5.Large intestine
6.Anus
7.Rectum

glands :
1.salivary glands in mouth
2.Pancreas
3.Liver

Hope that this will help you....!!