Moistening saliva fed into the mouth from nearby glands starts the process of chemical digestion using specialized proteins called enzymes. Secreted at various points along the digestive tract ...

VOICEOVER: Enzymes of the digestive system. Three key types of enzymes in different parts of our digestive system help break down the food to provide the energy our body needs to grow and repair.

Within the human digestive tract are trillions of bacteria ... It also raises the question of whether bacteria have more important defense systems than CRISPR. "This finding is significant because ...

The pancreas is an integral part of the digestive system. It makes digestive enzymes and fluids which are released in the duodenum to help break down proteins, carbohydrates and fats. This is called ...

VOICEOVER: Enzymes of the digestive system. Three key types of enzymes in different parts of our digestive system help break down the food to provide the energy our body needs to grow and repair.