Human Digestive System - Introduction | Free Online Course | Alison

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Human Digestive System - Introduction

Get a clear understanding of the human digestive system in this free online certificate course.

Free Course
This free online course on the human digestive system will give you a clear understanding of how our bodies turn food into fuel. The course covers a wide range of topics, from the energy cycle to food and vitamins and the absorption of products into our body. This course will be of great interest to anyone who wants to study the human body in detail and learn more about the processes within it, so make sure you start your learning journey today!





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If you have ever wanted to know more about how the body's digestive system works then this course will teach you all about it. It begins by introducing the energy cycle, discussing how energy from the sun is taken through the food chain and then through our bodies. The course then takes you through various different food groups and the substances they contain before guiding you through the various elements of the digestive system in humans.

The course then goes into detail about the digestive system, looking at each stage from ingestion to swallowing and how food is temporarily stored in our stomachs. It looks in detail at the function of each part of the stomach before moving on to discuss how food is primarily digested in the small intestine. The course then goes on to discuss how substances from the food are absorbed into our bodies.

Finally, the course talks about the elimination of waste materials which cannot be digested by our bodies, as well as discussing the reticuloendothelial system. Whether you want to study the digestive system as part of a wider course of biological study or just to learn more about how our bodies work, this course teaches you how we turn food into the energy we need to survive, so make sure you start learning today.

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Learning Outcomes

After completing this course, you will be able to:

  • Describe the human digestive system
  • Explain how energy is obtained from food
  • List the stages involved in the digestion process
  • Explain how nutrients are absorbed into the human body
  • Briefly describe how waste materials are eliminated from the human body
  • Describe the protection mechanisms of the digestive system


All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire an official Certificate, which is a great way to share your achievement with the world. Your Alison Certificate is:

Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning

Alison offers 3 types of Certificates for completed Certificate courses:

Digital Certificate - a downloadable Certificate in PDF format, immediately available to you when you complete your purchase
Certificate - a physical version of your officially branded and security-marked Certificate, posted to you with FREE shipping
Framed Certificate - a physical version of your officially branded and security-marked Certificate in a stylish frame, posted to you with FREE shipping

All Certificates are available to purchase through the Alison Shop. For more information on purchasing Alison Certificates, please visit our FAQs. If you decide not to purchase your Alison Certificate, you can still demonstrate your achievement by sharing your Learner Record or Learner Achievement Verification, both of which are accessible from your Dashboard. For more details on our Certificate pricing, please visit our Pricing Page.


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