CIE IGCSE Biology

Revision Notes

9.1.6 Coronary Heart Disease

Test Yourself

Coronary Heart Disease

The coronary arteries, IGCSE & GCSE Biology revision notes

The coronary arteries

  • The heart is made of muscle cells that need their own supply of blood to deliver oxygen, glucose and other nutrients and remove carbon dioxide and other waste products
  • The blood is supplied by the coronary arteries
  • If a coronary artery becomes partially or completely blocked by fatty deposits called ‘plaques’ (mainly formed from cholesterol), the arteries are not as elastic as they should be and therefore cannot stretch to accommodate the blood which is being forced through them - leading to coronary heart disease
  • Partial blockage of the coronary arteries creates a restricted blood flow to the cardiac muscle cells and results in severe chest pains called angina
  • Complete blockage means cells in that area of the heart will not be able to respire and can no longer contract, leading to a heart attack

Buildup of plaque in the coronary arteries, IGCSE & GCSE Biology revision notes

Buildup of plaque in the coronary arteries

Effect of narrowing of arteries, IGCSE & GCSE Biology revision notes

Effect of narrowing of arteries

Risk Factors for CHD Table

Diet, Exercise & Coronary Heart Disease

Reducing the risks of developing coronary heart disease

  • Quit smoking
  • Diet - reduce animal fats and eat more fruits and vegetables - this will reduce cholesterol levels in the blood and help with weight loss if overweight
  • Exercise regularly - again, this will help with weight loss, decrease blood pressure and cholesterol levels and help reduce stress

You've read 0 of your 0 free revision notes

Get unlimited access

to absolutely everything:

  • Downloadable PDFs
  • Unlimited Revision Notes
  • Topic Questions
  • Past Papers
  • Model Answers
  • Videos (Maths and Science)

Join the 80,663 Students that ❤️ Save My Exams

the (exam) results speak for themselves:

Did this page help you?

Lára

Author: Lára

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.