Human Digestive System

Tip: This video tracks and explains how food journeys from our mouth to the stomach, intestines and finally rectum.

Warning: Some may find this fascinating while others may find it gross!

Test Yourself: 

1. What is peristalsis?

2. How does the stomach carry out physical and chemical digestion?

Test Yourself:

1. Identify the main parts of the digestive system + describe the role that each part plays.

2. Explain how enzymes work: e.g. carbohydrases, proteases, and lipases

Test Yourself: What is absorbed into the bloodstream?

How do different nutrients enter the villus?

Tip: Connect this to the concept of 'diffusion'

Think: How does excess intake of carbohydrates over an extended period of time lead to diabetes?

Think: 1 in 3 Singaporeans have a lifetime risk of developing diabetes!

How does our food choices affect functions of the digestive system (and therefore, the overall well-being of our body)?

Test Yourself: What are the various properties of enzymes?

Test Yourself: Can you describe how the end-products of digestion are used for processes like respiration, growth and tissue repair?