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Matters of the heart Dr Louise Robson Department of Biomedical Science University of Sheffield L Robson, University of Sheffield
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Matters of the heart Where is it? How big is it? What does it do? How? What happens when we exercise? L Robson, University of Sheffield
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Where is the heart in our body? Left arm Right arm Right shoulderLeft shoulder Neck Lungs HEART? Can you feel your heart? L Robson, University of Sheffield
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What shape is the heart? L Robson, University of Sheffield
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A heart model L Robson, University of Sheffield
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How big is the heart? Make a fist! L Robson, University of Sheffield
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What does the heart do? Blood Lungs Brain Arms Legs Skin Body L Robson, University of Sheffield
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Why does the heart pump blood? L Robson, University of Sheffield
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How does the heart pump blood? L Robson, University of Sheffield
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The heart has two sides! 1 2 L Robson, University of Sheffield
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The heart has two sides! 1 2 L Robson, University of Sheffield
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The heart has four chambers! Atria Ventricles 1 3 4 2 L Robson, University of Sheffield
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The heart has four chambers! Atria Ventricles 1 2 3 4 L Robson, University of Sheffield
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How does blood move through? Atria Ventricles L Robson, University of Sheffield
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Blood vessels Arteries & veins How does blood move into and out of the heart? L Robson, University of Sheffield
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Arteries & veins Vein Artery Artery from the heart Vein to the heart L Robson, University of Sheffield
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Arteries & veins Artery carries oxygenated blood Red Vein carries de-oxygenated blood Blue/purple Can we look at blood vessels today? L Robson, University of Sheffield
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Looking at blood vessels on the inside! Angiogram Inject dye into blood vessels Take an X-ray (broken bones) Dye picked up L Robson, University of Sheffield
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Angiograms www.mayfieldclinic.com/PE/PE- ANGIO.htm L Robson, University of Sheffield
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Why does blood move? Heart beats 72 times every minute Contracts Squeezes blood out Balloon model L Robson, University of Sheffield
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Heart is made of muscle cells When the heart beats, heart cells get smaller – they contract. L Robson, University of Sheffield
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Heart cells change size at the same time When all the cells get smaller at the same time they make the heart contract. This squeezes the blood out. L Robson, University of Sheffield
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What happens during exercise? L Robson, University of Sheffield
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Let us do an experiment! L Robson, University of Sheffield
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What happens Faster heart rateFaster & deeper breathing L Robson, University of Sheffield
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What have we covered Heart: where, size, role & how it pumps Lungs: where, role and how they work What happens when we exercise L Robson, University of Sheffield
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Something for the teachers! http://www.mrc.ac.uk/ http://www.bbsrc.ac.uk/ http://www.wellcome.ac.uk/ http://www.lifesci.org/meetdb/default.htm http://www.biology4all.com/ http://www.nuffield.com/ http://www.royalsoc.ac.uk L Robson, University of Sheffield
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