AS Level Biology - The Heart

**This Powerpoint specifically uses the Cambridge AS Level Biology Syllabus and covers all criteria for – The Heart
**
Students will be able to -

1 describe the external and internal structure of the mammalian
heart

2 explain the differences in the thickness of the walls of the:
• atria and ventricles
• left ventricle and right ventricle

3 describe the cardiac cycle, with reference to the relationship
between blood pressure changes during systole and diastole
and the opening and closing of valves

4 explain the roles of the sinoatrial node, the atrioventricular
node and the Purkyne tissue in the cardiac cycle (knowledge
of nervous and hormonal control is not expected)

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**

Bring your Cambridge AS Level Biology lessons to life with our expertly designed teaching resources. Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.