A powerpoint from the OLD syllabus, but much is still relevant.

A fantastic animated tutorial from McGraw Hill Education on the Organs of Digestion & one on the action of Sucrase.

Mr Paul Andersen (from Bozeman High) details The Digestive System in a 9m 38s tutorial:

In Crash Course Biology #28 – The Digestive System, Hank takes us through the bowels of the human digestive system and explains why it’s all about surface area.