The Digestive System - GCSE Biology (9-1)

This video is designed for Edexcel IGCSE Biology 9-1 4Bi1 but will be suitable for most GCSE courses as well. It covers the following objectives.

2.27 Describe the structure and function of the human alimentary canal, including the mouth, oesophagus, stomach, small intestine (duodenum and ileum), large intestine (colon and rectum) and pancreas.

2.28 Understand how food is moved through the gut by peristalsis.

2.29 Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases.

2.30 Understand that bile is produced by the liver and stored in the gall bladder.

2.31 Understand the role of bile in neutralising stomach acid and emulsifying lipids.

2.32 Understand how the small intestine is adapted for absorption, including the structure of a villus.

2.33B Practical: investigate the energy content in a food sample.