CBSE Class 7 Answered

Liver:

• The liver is a reddish-brown gland situated in the upper part of the abdomen on the right side.
• It secretes bile.
• Bile juice helps in digestion of fats. It breaks down large fat globules into smaller ones. Bile salts reduce the surface tension of fats and break them into tiny droplets. This is called emulsification. Emulsification helps lipase to act on fats by providing greater surface area for the action of enzyme.

Pancreas:

• The pancreas is a long, leaf-like transparent gland, about 15-20 cm long. It is a yellowish-grey gland present on the left side of the duodenum below the stomach.

• The pancreas secretes pancreatic juice. It has digestive enzymes trypsin, enterokinase, steapsin and pancreatic amylase, which partly digest proteins, fats and carbohydrates. Pancreatic juice has a large amount of sodium bicarbonate, which neutralises the acid present in chyme and makes it alkaline.