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St Paul's C of E Primary School

Heathside Grove

LEARNING to make a difference

Week 1

This half term, our Science topic is 'The Circulatory System'.


Just like we do in school at the start of a new topic, we need to think about what we already know and what we would like to know.


Write down 5 facts that you already know about how to keep your body healthy and about the human heart.


Write down 5 questions that you would like to know about the human heart or the circulatory system.


What is the circulatory system?

Go on to find out more information about the circulatory system.

Watch the video, fill in the gaps and take the quiz.


LO: To know the main parts of the circulatory system and explain their functions.


There are two main parts to the circulatory system - the pulmonary circulation and the systemic circulation. In the pulmonary circulation, blood is pumped from the heart to the lungs and back. In the systemic circulation, blood is pumped from the heart to all of the other parts of the body and back.


The Heart

The heart continuously contracts, or beats, pumping blood around the circulatory system. It contains valves so that blood only flows in one direction.




Blood Vessels

The blood vessels are the tubes within the human body which carry blood. Blood vessels include arteries and veins. Arteries carry blood away from the heart, and veins bring it back. Blood vessels are thick and wide near the heart, but branch off into smaller ones called arterioles, venules and capillaries



Blood is important because it carries materials around the body. It contains red blood cells, which carry oxygen - every living cell in the body requires oxygen, or it will quickly die. Blood also carries white blood cells, which fight infections, and platelets, which clot together to stop bleeding. It also carries other nutrients, such as sugar and salt. In addition, blood carries waste carbon dioxide from around the body to the lungs, where it can be removed. 



Use this information, plus any additional research to answer the following questions.


What are the two main parts of the circulatory system?

What is the difference between arteries and veins?

How does the heart pump blood?

What is the difference between red and white blood cells?