Year 8 Science · Unit 1 · Lesson 9

The Circulatory System

Challenge Worksheet

Name

Date

Class

Learning Goals

Identify and correct errors in a student's description of the circulatory system.
Evaluate the consequences of one component failing in the circulatory system.
Construct a full, accurate explanation of how the circulatory system delivers substances to body cells.

Go Deeper

Find the mistake

A student wrote this answer

"The circulatory system is just the heart. The heart is the only component that matters because it is what keeps you alive. Blood is not really part of the circulatory system, it is just a liquid that happens to be in your body. Blood vessels are basically just a decoration; the heart could pump substances directly to cells without them. The circulatory system transports substances, but it does not interact with any other body system."

1. This paragraph contains four scientific errors. List each error you can find.

Challenge 4 marks

2. Rewrite the paragraph correctly, using component-role-function language from the lesson.

Challenge 3 marks

Show What You Know

1. Heart disease is a leading cause of death in Australia. One cause is that the blood vessels supplying the heart muscle with blood can become narrowed. Using your knowledge of the circulatory system's three components and their roles, explain why narrowed blood vessels around the heart are life-threatening.

Challenge 4 marks

2. The circulatory system must interact with other body systems to keep cells alive. Describe one specific example of the circulatory system interacting with another system you have studied in this unit, and explain what would happen if this interaction stopped.

Challenge 3 marks

Wrap Up

In one sentence, what was the main idea of this lesson?