Oral cavity:

• It is the first part of the digestive system. It consists of the tongue, teeth and salivary glands.
• The teeth help to grind and chew the food we eat.
• The tongue helps in the movement of food during chewing and helps in swallowing.

Salivary glands:

• There are three pairs of salivary glands in our mouth.
• The salivary gland secretes saliva that helps to moisten food and allow the food to be swallowed easily.
• A particular substance present in the saliva help in the initial process of digestion of starchy foods.

Oesophagus/Food pipe:

• After we chew our food properly, it enters the oesophagus.
• It is a long hollow tube through which food is carried forward to the stomach.

Stomach:

• It is a hollow pouch-like organ.
• The food is stored in the stomach for several hours.
• The gastric glands of the stomach release digestive juices that mix with the food.
• Partial digestion of food takes place in the stomach.

Liver:

• It is the largest organ of the digestive system.
• It secretes a yellowish-green fluid called bile.
• Bile is essential for the digestion of fatty food.

Gall bladder:

• It is a pear-shaped gland that is connected to the liver.
• The gall bladder helps the liver by storing the bile produced when digestion of food is not taking place.
• When the fatty food reaches the duodenum (the first part of the small intestine), the gall bladder squeezes to push out bile that helps in digestion.

Small intestine:

• It exists as a coiled structure, and here, the nutrients and minerals from the digested food are absorbed into the body.
• The major part of food gets digested in the small intestine.
• It has many blood vessels that help in the absorption of nutrients and minerals.

Pancreas:

• It secretes juices that help in the digestion of all food components.
• When food enters the small intestine, the pancreas gets a signal to secrete the juices that travel to the small intestine via tubes thereby aiding digestion.

Large intestine:

• It is the part that comes after the small intestine.
• Water and salts from the undigested food get absorbed in the large intestine.
• It also stores the solid undigested food as faecal matter till it is expelled out of the body.

Anus:

• It is the last part of the digestive system.
• The anus is an opening in the body that helps to expel out the solid undigested waste matter from the body.