Year 8 - Science
Absorption and transport of nutrients in humans
Human digestive system
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit examines the human digestive system, including the roles of tissues, organs, enzymes, and beneficial bacteria. It also focuses on evaluating risks, interpreting data, identifying patterns, and suggesting improvements to enhance the reliability of investigations.
Lesson Summary
You will learn to describe how the digestive system and circulatory system work together to absorb nutrients and transport them around the body.
Key Notes
- Carbohydrates, proteins and fats in food are broken down by digestion into smaller molecules that can be absorbed.
- Nutrients are absorbed into the blood, which transports them around the body to where they are needed by cells.
- The molecules of some nutrients are small enough to be absorbed into the blood by diffusion.
- Adaptations of the small intestine lining that increase the amount of absorption.
Vocabulary To Learn
- blood: Blood is a liquid which transports nutrients and waste around the body.
- absorption: Absorption is the process of moving nutrients from the digestive system into the blood.
- surface area: Surface area is the area of a surface.
- diffusion: Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
- circulatory system: The circulatory system includes the heart and blood vessels through which blood can move.
Common Mistakes To Avoid
- That the blood and circulatory system are synonyms.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Carbohydrates, proteins and fats in food are broken down by digestion into smaller molecules that can be absorbed. Nutrients are absorbed into the blood, which transports them around the body to where they are needed by cells.
2. Define this scientific word and use it in context. 'blood'
Blood is a liquid which transports nutrients and waste around the body. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: That the blood and circulatory system are synonyms. Correction: Blood and circulatory system are key words and introduced as specific concepts.
More Lessons In This Unit
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