Human body systems · Lesson 1
The human digestive system
Follow food through the body and discover how nutrients reach your cells.
JHS2.IS.HBS.1JHS2.IS.HBS.220 min
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◎Learning objectives
By the end of this lesson, you can:
- Identify the main organs of the digestive system.
- Explain how food is broken down and absorbed.
Read and explore
Your body’s food-processing journey
Digestion turns the food you eat into small nutrients that can pass into the blood and support growth, repair, and energy.
★Science in daily lifeChewing well increases the surface area of food, helping enzymes begin their work more effectively.