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Science

Science (1 hour 30 minutes)

 

LO: To identify and name the main parts of the circulatory system.

Wish 1: I can name the parts of the circulatory system.

Wish 2: I can describe the way blood moves through our circulatory system. 

Wish 3: I can explain the importance of the circulatory system.

 

Big Question: How does this help living things to survive?

 

FFM: write one sentence that you think defines blood.

 

The circulatory system is one of the most important in the body.  It is made up of 4 main parts: The heart, The lungs, The blood vessels and Blood. The circulatory system acts are your body's delivery system.

 

The body's circulatory system is responsible for transporting materials throughout the entire body. It delivers nutrients, water, and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce. It is an amazing highway that travels through your entire body connecting all your body cells.

 

At the centre of this system is the heart, a muscular organ. The heart beats about 3 billion times during an average lifetime. It is a muscle about the size of the fist. The heart is located in the centre of the chest slightly to the left. Its job is to pump blood and keep the blood flowing throughout the body. Blood helps oxygen get around your body. When you exercise you can feel your pulse, it tells you how fast your heart is pumping.

 

Watch the following clip: https://www.bbc.co.uk/bitesize/topics/zwdr6yc/articles/zs8f8mn

 

How does the blood move through our circulatory system?

As your heart muscle contracts, it pushes blood through your heart. Your heart pumps blood from its left side, through the aorta (the main artery leaving the heart) and into the arteries. The blood travels through your arteries, which divide off into smaller and smaller blood vessels called capillaries. Travelling through this network of capillaries, blood reaches every part of your body.

The de-oxygenated blood then travels back to the heart through your veins which lead back to the right side of your heart. Like every other living tissue, the heart needs a constant supply of blood. This comes from the coronary arteries which branch off from the main artery (aorta) as it leaves the heart. The coronary arteries spread across the outside of the heart, supplying it with blood.

 

Main task: Draw the circulatory system using the knowledge from this lesson – use blue and red to add colour correctly.
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