Human Digestive System - Online Certification | Alison

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Introduction to the Human Digestive System

Gain a better understanding of the structure and function of the human digestive system with this course.

Free Course
This free online biology course will teach you everything you need to know about how humans obtain energy from food. You will study the different types of food and vitamins and the stages involved in ingesting and swallowing food. You will learn how the stomach stores food and operates each of its digestive functions, how the small intestine and large intestine are involved with the food digestion process, and more!





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This course begins by discussing the human digestive system. You will learn that the function of the human digestive system is to provide materials for energy, growth, and repair. You will study the processes involved in the human digestive system including ingestion, initial processing, storage, digestion, absorption, and elimination. This course will also discuss carbohydrates, lipids, and protein which are the three main food types. You will also look into other necessary nutrients including water, vitamins, and minerals.

This course will then delve into ingestion, the stages of the swallowing process, and the structure and functions of the stomach. You will also study how food is digested in the human body, how nutrients are absorbed, and how waste materials are eliminated. You will look into the protection mechanisms of the digestive system as well as how the mammary gland provides protection from infection, for a baby, and during breastfeeding.

The human body cannot generate energy itself and so must obtain it from external sources. Energy from the sun is captured by plants, which in turn are eaten by animals. Humans use these plants and animals as food sources that must be broken down into smaller molecules for the body to process. This is accomplished by a complex series of organs known as the digestive system. After completing this course you will have a better understanding of the structure and functions of the human digestive system so make sure to sign up for this course!

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Learning Outcomes

After completing this course you will be able to: - Describe the structure of the human digestive system; - and explain the functions of the human digestive system.


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