Describe how starch is digested mechanically and chemically from the time we eat it in our mouth until it reaches our small intestine where it's absorbed.

The food firstly is mechanically digested in the mouth by the action of our teeth and tongue when we bite and churn it around. The saliva secreted in our mouth contains amylase which chemically breaks down the bread to smaller sugars. Then it reaches the back of our mouth where our oesophagus takes over and by the action of peristalsis it pushes it down to reach our stomach. In the stomach starch isn't broken down further but the mechanical churning and acid secreted in the stomach helps break it down further mechanically. The bolus will then reach the small intestine where more amylase is available to break down the starch into sugars. One of these sugars that starch is broken down is galled glucose. Glucose is then finally absorbed by the wall of the small intestine.