Digital Lesson Hub:
Biology A Level

During this lesson you will learn how to:

• Describe the general pattern of blood circulation in mammals
• Describe the structure of the heart, including chambers, vessels and valves
• Explain the function of valves and cardiac muscle

During this lesson you will learn how to:

• Describe the flow of blood through the heart 

• Explain the pressure changes that occur during the cardiac cycle
• Explain what causes valves to open and close during the cardiac cycle

During this lesson you will learn how to:

• Describe and explain the shape of a graph which shows pressure changes during the cardiac cycle.
• Explain what causes valves to open and close during the cardiac cycle
• Use the cardiac cycle graph to calculate heart rate

During this lesson you will learn how to:

• Describe the structure and function of the different types of blood vessels in mammals.​
• Explain how the structure of the each type of blood vessel is related to its function.

During this lesson you will learn how to:

• Describe the structure of haemoglobin.​
• Describe the function of haemoglobin in the human circulatory system.​
• Explain how changes in the internal environment of the blood change the structure of haemoglobin, resulting in changes in the function of haemoglobin.