Circulatory System

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  • Science Understanding “Cells are the basic units of living things and have specialised structures and functions. Multi-cellular organisms contain systems of organs that carry out specialised functions that enable them to survive and reproduce.”
  • Science Inquiry Skills – “Construct and use a range of representations, including graphs, keys and models to represent and analyse patterns or relationships, including using digital technologies as appropriate.”

Learning Intention and Success Criteria: Students will be able to identify the structure and function of organs in the circulatory system and be able to name and describe the components of blood. Students will complete a labelled diagram of the heart and circulatory system and be able to describe how it works.

The Circulatory System is also called the “Cardiovascular System” and consists of the heart, arteries, veins, capillaries and the five litres of blood (approximately) that flows through this system.

1. Work your way through the National Geographic – Heart Interactive. Label the blank heart diagram with the names of each structure, including the atria, ventricles, aorta and valves.

2. Watch the National Geographic Video – Cardiovascular system and then colour the cardiovascular diagram showing oxygenated (red) and deoxygenated (blue) blood.

3. Access the Blood Buddies – the Australian Red Cross Blood Service website and find out how you are tested for your blood type. Do you know what blood group you belong to? Create a graph (bar graph or pie chart) showing the different blood groups:

  • O positive – 40%
  • O negative – 9 %
  • A positive – 31%
  • A negative – 7 %
  • B positive – 8%
  • B negative – 2%
  • AB positive – 2 %
  • AB negative – 1%

Other information:

Student graph showing percentages of each blood type from Australian Red Cross data using “Create-a-graph”.

Year 8 Science: Human Body Systems

arteries and qr code
Each student chooses an organ from either the circulatory, respiratory, digestive or excretory system. They write a web page on a wiki, describing the structure and function of that organ, including labelled diagrams. They write five “I am” statements about the organ and then find out two other organs attached to their organ and link their page to those two pages. They then create a QR code for the answer (heart, arteries, lungs etc) at either of these two sites: QR code or kaywa qr codes with the URL link that directs the reader to their wiki page. The QR code is then attached to the appropriate organ in the human torso model.

For example: “I am an organ in the circulatory system that carries oxygenated blood from the heart. I have thick, muscular walls, no valves and lead to the capillaries.” The QR code scans to produce the link to the wiki page with the answer, “Arteries”, and all the information about that organ. This page would be linked to the heart and capillaries pages.