The final part of the lesson looks at the role of the capillaries in exchange. Moving forwards, the lesson considers the structure of the veins and students are challenged to explain how the differences to those observed in arteries is due to the lower blood pressure found in these vessels. A quick version of the GUESS WHO game is used to introduce smooth muscle and collagen in the tunica media and externa and again the reason for their presence is explored and explained. Students will be able to make the connection between the narrow lumen and elastic tissue in the walls of arteries and the need to maintain the high pressure of the blood. Moving forwards, the lesson focuses on the link between the structure of a particular type of blood vessel and its function.

For example, students will learn that humans have a double circulatory system, which will prepare them for the next lesson, and are challenged to explain why a hole in the septum would cause health issues for an affected individualīy the end of the first part of the lesson, the students will be able to identify the following structures and describe their individual functions: Time is taken at appropriate points to look at some of the structures and concepts in further detail. The main task of the first half of the lesson involves students labelling the different structures as they are recalled. The structure of the heart is a topic which was covered in part at GCSE so this lesson has been written to build on that prior knowledge. The engaging and detailed PowerPoint and accompanying resources have been designed to cover point 4.1 (i) as detailed in the Edexcel A-level Biology Bspecification. This fully-resourced lesson describes the relationship between the structure and the function of the heart, arteries, veins and capillaries.

Free download structure of heart