higher human biology. cvd is responsible for a huge proportion of deaths annually
TRANSCRIPT
![Page 1: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/1.jpg)
Higher Human Biology
![Page 2: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/2.jpg)
CVD is responsible for a huge proportion of deaths annually
![Page 3: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/3.jpg)
Atherosclerosis
Formation of plaques (atheromas) beneath the endothelium in an artery
Start off as mainly fatty material (cholesterol)
Become enlarged due to collecting fibrous material, calcium and more cholesterol
![Page 4: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/4.jpg)
![Page 5: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/5.jpg)
![Page 6: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/6.jpg)
Larger atheromas can lead to; Significant reduction in diameter of
arteries lumen Restriction of blood flow to the capillary
bed served by that artery An increase in blood pressure
![Page 7: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/7.jpg)
Large plaques hardened by deposits of calcium cause arterial walls to become thicker and less elastic
“hardening of the arteries”
![Page 8: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/8.jpg)
Symptoms of atherosclerosis come on in later life
Can lead to various cardiovascular diseases; Coronary heart disease (inc. angina) Strokes Heart attacks (myocardial infarctions)
![Page 9: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/9.jpg)
Atherosclerosis can also cause peripheral vascular disease
![Page 10: Higher Human Biology. CVD is responsible for a huge proportion of deaths annually](https://reader036.vdocuments.site/reader036/viewer/2022081520/5697bff51a28abf838cbdcb9/html5/thumbnails/10.jpg)
http://www.nhs.uk/video/Pages/coronary-arteries-and-heart-disease.aspx?searchtype=Tag&searchterm=Heart_vascular__Conditions&offset=17&