Pushing Blood Around By the end of this lesson, you will be able to… Describe the difference between arteries and capillaries Explain double circulation. Label the structures of the heart. Today’s Activities Discussing: How does blood get around Watching: The heart Observing: the difference between arteries and veins Notes

Which system is this? Lungs Heart Artery Vein

What is the role of the blood? Glucose Red blood cell Plasma Capillary + Oxygen Water + CO2 Energy Nucleus Muscle cell TRANSPORT, but how do you know?

What are the advantages and disadvantages of each of these circulatory systems? FISH Single Circulation MAMMALS Double Circulation

Traffic control A drag and drop activity

A double circulatory system Our circulatory system is in two parts and is called a double circulatory system. This section of the system including the right side of the heart, deals with the deoxygenated blood. Lungs Body cells This section of the system including the left side of the heart, deals with the oxygenated blood. Now draw and label fig 9. on p.23 of Platinum Text book

The Heart This is the pump at the centre of the circulatory system. Not all living organisms have hearts. Also, the shape of the heart can change, depending on what species you look at. The heart is made almost entirely of muscle. It is unlike any other muscle in your body because it never tires. And even though it is full of blood it still needs it own blood supply. Oxygenated blood is carried to the heart by the coronary arteries.

Each side of the heart has two chambers. 1. A top chamber or atrium and 2. A bottom chamber or ventricle Each of these chambers has its own function.

thick muscle and elastic fibres Artery cross-section thick muscle and elastic fibres small lumen

Veins: cross-section large lumen thin muscle and elastic fibres

A drag and drop activity

Now copy and complete the table from Activity 5 on p Now copy and complete the table from Activity 5 on p.55 of Platinum G9 Text Book Characteristics Arteries Veins Capillaries Direction of Blood Flow Type of blood transported Thickness of Walls Blood pressure in vessels