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”.

Circulatory System


Learning Intention:
Students will understand the structure and function of the human circulatory system and it’s importance to a healthy body.

Success Criteria:
You will be able to name the important structures of the circulatory system and describe how they work in the human body.

Check out Miss Richardson’s Blog. The circulatory system is the transport system of the body – it consists of the heart, the blood vessels (veins, arteries and capillaries) and the blood. Blood is made up of plasma, red blood cells, white blood cells and platelets. Every cell in the body is within one or two cells of a capillary, which allows the transfer of dissolved gases (oxygen and carbon dioxide), nutrients, wastes (such as urea), hormones and heat. The following resources will assist you to learn about the circulatory system of humans:

Brightstorm: The circulatory system

Blood Flow through the Heart

Animation of the Human Heart Beating from the National Health Library

The Human Heart from the National Geographic

Blood Buddies – the Australian Blood Bank site

The Incredible Human Machine from National Geographic