Chemicals that take part in the reactions of digesting food and in speeding up reactions inside cells are called:

The tube that connects the mouth to the stomach:

Which enzyme is produced by the stomach wall?

Where is the bile produced?

Which element acts as a heat insulator and helps to keep the mammals warm in cool conditions?

Which organ plays a major part in the physical breakdown of food?

The chemical needed for the body to keep it in good health.

Cellulose in food is known as :

Which vitamin is involved in allowing the eye to see in dim light?

Which type of enzyme is present in saliva ?