Structure of blood vessels (Edexcel A-level PE)

This detailed lesson describes how the structure of the arteries, veins and capillaries enables these blood vessels to perform their functions. The engaging PowerPoint and accompanying resource have both been designed to cover the 3rd part of point 1.2.5 as detailed in the Edexcel A-level PE specification.

The aorta, vena cava, pulmonary artery and pulmonary vein were covered in a previous lesson on the structure of the heart so this lesson focuses on the location and structure of these 3 different types of blood vessels. Students will have met arteries, veins and capillaries at GCSE so this lesson builds on that knowledge whilst also introducing the arterioles and venules to deepen their understanding. Time is taken to look at the structure of the artery and specifically at how the narrow lumen and thick wall allows this blood vessel to maintain the high pressure of blood and also withstand it. Students will learn that arterioles are involved in the redistribution of blood and then are challenged to describe and explain when blood would be shunted away from the kidney. Moving forwards, the students are encouraged to discuss how the location of capillaries next to tissues enables a fast rate of diffusion. The rest of the lesson describes how venules connect capillaries to a vein and the structure of this final blood vessel is compared against arteries, where students have to explain a vein has a wider lumen with valves and a thinner wall.

A series of quiz rounds are used throughout the lesson to maintain engagement whilst introducing key terms and values.