Blood vessels and blood

Now that we understand the structure and function of the heart we need to look at the next 2 components of the circulatory system, the blood vessels and the blood.

We will start our study of the circulatory system by looking again at the past paper data analysis question on blood pressure. As you can see from the graph the presures in the arteries can be very high – to cope with these pressures arteries have certain adaptations. By the time the blood has passed from arteries to arterioles to capillaries to venules and veins, how do you think the pressure has changed, and how might that be reflected in the structure of veins? To answer that question we will look at This and this Khan academy Videos.  If you want to test your understanding of this Topic check out the 3 quizzes.

Finally we look at the components of blood and what it carries. A nice introductory Video on blood can be found HERE.



Topic 6.2 The Transport System

When we looked at digestion we started with a Ted talk from Dean Ornish which looked at how a typically Western diet and lifestyle can be detrimental to your long term health. There are however indigenous human populations scattered around the planet where longevity is the norm. If you want to know their secret then check out what Dan Buettner has to say Here.

In class we will cover heart structure and function and you must refer to the curriculum statements for this topic which can be found on the previous post.

There are some really good resources on the heart at Khan academy. If you want to see an overview of the heart check out THIS link. On the Left Hand side of the Screen you will notice a whole string of related Videos and resources which you may wish to look at.

We will cover briefly risk factors for heart disease when we look at youtube clip.

Control of heart rate is covered

We will use This learning resource from Khan academy together with Stephen Taylors SlideShare on transportation..

Note, on Tuesday you will start the lesson by drawing a labelled diagram of the heart. This can be a little complicated so to help you check out the following video. The only Thing that needs to change is that the bi-cuspid and tri-cuspid valves are known by the IB as atrioventricular valves