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Copyright of for more videos,visit us. Introduction 1The human body The human bodyThe human body 2What does the heart do? What does the heart do?What does the heart do? 3Heart key facts Heart key factsHeart key facts 4Heart health Heart healthHeart health 5What do the lungs do? What do the lungs do?What do the lungs do? 6Lungs key facts Lungs key factsLungs key facts 7The circulation The circulationThe circulation 8Pulse and exercise Pulse and exercisePulse and exercise 9Pulse rate data Pulse rate dataPulse rate data 10How do I look after them? How do I look after them?How do I look after them? Heart and lungs quiz Heart and lungs quiz Links for further study Links for further study Unit 5a Keeping Healthy: The Heart and Lungs Year 5 Science by Mrs. Chapman

Copyright of for more videos,visit us. Human body Your body is very special. We need to look after our bodies to stay healthy. Although we may look still and quiet on the outside, our body is constantly moving and changing inside. Can you find the brain, the heart and the lungs?

Copyright of for more videos,visit us. What does the heart do? Your heart, made of muscle, pumps blood around your body via blood vessels (tubes). The heart is inside your chest, protected by bones - the ribs and breast bone. When the heart pumps, it beats - we measure the heartbeat via the pulse - easily found on your wrist and neck. Blood carries oxygen to the parts of the body that need it.

Copyright of for more videos,visit us. Heart key facts Your heart is about the size of your fist. In most adults it beats about 70 times a minute (70 bpm). In children and small animals, the heart beats faster. The first heart transplant was in You cannot normally live for more than 5 minutes if your heart stops beating. Heart disease is the number 1 killer in the western world! Doctors examine your heart by taking the pulse (to see how fast it’s beating), ECGs (special electrical rhythm charts), x-rays and scans including ultrasound (like an unborn baby scan).

Copyright of for more videos,visit us. Heart health Man having a chest x-ray Heart on chest x-ray ECG graph output Ultrasound output

Copyright of for more videos,visit us. What do the lungs do? Your lungs receive the air you breathe in through your nose. When you breathe in, the lungs puff-out or inflate, and deflate when you breathe out. From the air, they take the useful part - oxygen ( a gas ), and convert it for use in the body via the bloodstream. The blood swaps carbon dioxide ( the waste material ) for oxygen in the lungs. This is why the lungs are often said to convert gases.

Copyright of for more videos,visit us. Lungs key facts You have 2 lungs. Your lungs are protected by your ribcage. Close-up, they look like a wet sponge. The left lung is smaller - to accommodate your heart (see the x-ray showing the heart). Your lungs are particularly vulnerable to breathing-in nasty substances - toxic chemicals, smoke from fires and cigarette smoke all damage your lungs. You have 2 lungs. Your lungs are protected by your ribcage. Close-up, they look like a wet sponge. The left lung is smaller - to accommodate your heart (see the x-ray showing the heart). Your lungs are particularly vulnerable to breathing-in nasty substances - toxic chemicals, smoke from fires and cigarette smoke all damage your lungs.

Copyright of for more videos,visit us. The circulation Blood (with oxygen and nutrients) goes round our bodies via the heart. We call this circulation ( from the word ‘circle’ ). The heart sends blood to the lungs first to collect the oxygen from the air we’ve just breathed-in, then it goes to where it’s needed ( this is shown in red ). The blood then returns to the lungs via the heart ( this is shown in blue ) with carbon dioxide - the gas that we breathe out. This is described as a figure of ‘8’.

Copyright of for more videos,visit us. Pulse and exercise When you exercise parts of your body need an increased blood supply (more oxygen and nutrients) so your heart beats faster. You also breathe faster - to get more oxygen into your lungs, and to get rid of the carbon dioxide. You also get hot and sometimes flushed (or red faced). What parts of the body need an increased blood supply when running? Take your resting pulse and produce a bar chart of your group’s results. What is the most common range for pulse?

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