In the human digestive system, bile is secreted by:

$A$ few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains

What is the function of enzymes in the human digestive system?

Name the substances on which the following enzymes act in the human digestive system: $(i)$ $Trypsin$. (ii) $Amylase$. (iii) $Pepsin$. (iv) $Lipase$.

What is the name of the tiny, finger-like projections on the inner surface of the small intestine that help in absorbing the digested food?

Explain the term $ingestion$.