Matters of the heart Dr Louise Robson Department

Matters of the heart Dr Louise Robson Department of Biomedical Science University of Sheffield L Robson, University of Sheffield

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

Where is the heart in our body? Neck Right shoulder Left shoulder Right arm Left arm Can you feel your heart? Lungs HEART? L Robson, University of Sheffield

What shape is the heart? L Robson, University of Sheffield

A heart model L Robson, University of Sheffield

How big is the heart? Make a fist! L Robson, University of Sheffield

What does the heart do? Lungs Blood Body Brain Blood Skin Arms Blood Legs L Robson, University of Sheffield

Why does the heart pump blood? L Robson, University of Sheffield

How does the heart pump blood? L Robson, University of Sheffield

The heart has two sides! 2 1 L Robson, University of Sheffield

The heart has two sides! 2 1 L Robson, University of Sheffield

The heart has four chambers! Atria 2 1 4 3 L Robson, University of Sheffield Ventricles

The heart has four chambers! 2 1 Atria 4 3 L Robson, University of Sheffield Ventricles

How does blood move through? Atria Ventricles L Robson, University of Sheffield

How does blood move into and out of the heart? Blood vessels Arteries & veins L Robson, University of Sheffield

Arteries & veins Artery from the heart Vein to the heart Artery Vein L Robson, University of Sheffield Vein

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

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

Angiograms www. mayfieldclinic. com/PE/PEANGIO. htm L Robson, University of Sheffield

Why does blood move? Heart beats 72 times every minute Contracts Squeezes blood out Balloon model L Robson, University of Sheffield

Heart is made of muscle cells When the heart beats, heart cells get smaller – they contract. L Robson, University of Sheffield

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

What happens during exercise? L Robson, University of Sheffield

Let us do an experiment! L Robson, University of Sheffield

What happens Faster heart rate L Robson, University of Sheffield Faster & deeper breathing

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

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. biology 4 all. com/ http: //www. nuffield. com/ http: //www. royalsoc. ac. uk L Robson, University of Sheffield