Unit 4 The circulatory and excretory systems

There is an excellent blog made in a science bilingual project, we are going to use it as a source of good learning material, for example this entry related to circulatory system.
How can we measure blood pressure?
How a normal heart pumps blood?
And please dont forget the lymphatic system,  another video.
The best 2012 scientific video is catalan and about the heart,    let´s look at it.
YOu have also to know the blood groups , and the blood cells. There is also a video.
Let`s do some quizzes: quiz 1, quiz 2,  quiz 3,    

And now, lets´look at our kidneys: How kidneys work,  The kidneys ,  kidney: structure and function ;  and nephron . And some quizzes:  quiz 1 ,  quiz 2 , quiz 3 ,  quiz 4 , quiz 5 , quiz 6 .