Define atherosclerosis.

Outline how a lifestyle of physical inactivity increases the risk of cardiovascular disease.

The diagram shows an anterior view of the heart.

[Source: adapted from Coronary arterial circulation, author: Addicted04, https://commons.m.wikimedia.org/wiki/File:Coronary_
arterial_circulation_-_es.svg. Licensed under the Creative Commons Attribution 3.0 Unported license
(https://creativecommons.org/licenses/by/3.0/deed.en).]

Annotate parts X and Y of the coronary circulation.

X:

Y: 

hardening of artery walls / an artery becomes damaged and blocked <with cholesterol and other material> ✔

people who are physically inactive are more likely to have risk factors for cardiovascular disease <such as high blood pressure, obesity, type 2 diabetes and low HDL-cholesterol> ✔

X: <left> circumflex artery: supplies blood to <most of> the left atrium and <the posterior and lateral walls of> the left ventricle
OR
circumflex artery / branches: provides blood to the SA node ✔

Y: left anterior descending artery: provides the major blood supply to the interventricular system 
OR 
left anterior descending artery: blockage of this artery due to coronary artery disease can lead to impairment or death ✔

Accept other valid annotations.

Accept labels as well as annotations.